Apply a list_images rule of GET to image client

[GET /resources] methods should be "list_<resource name>s"
or "show_<resource name>", so this patch applies the part
of the rule to image client.

Partially implements blueprint consistent-service-method-names

Change-Id: Ie5de68e4c98c9925bd562a28a78351dc21388a17
diff --git a/tempest/api/image/base.py b/tempest/api/image/base.py
index acf8272..00959d9 100644
--- a/tempest/api/image/base.py
+++ b/tempest/api/image/base.py
@@ -146,7 +146,7 @@
         cls.alt_tenant_id = cls.alt_img_client.tenant_id
 
     def _list_image_ids_as_alt(self):
-        image_list = self.alt_img_client.image_list()
+        image_list = self.alt_img_client.list_images()
         image_ids = map(lambda x: x['id'], image_list)
         return image_ids
 
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index ea95059..fc75d95 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -168,14 +168,14 @@
     @test.idempotent_id('246178ab-3b33-4212-9a4b-a7fe8261794d')
     def test_index_no_params(self):
         # Simple test to see all fixture images returned
-        images_list = self.client.image_list()
+        images_list = self.client.list_images()
         image_list = map(lambda x: x['id'], images_list)
         for image_id in self.created_images:
             self.assertIn(image_id, image_list)
 
     @test.idempotent_id('f1755589-63d6-4468-b098-589820eb4031')
     def test_index_disk_format(self):
-        images_list = self.client.image_list(disk_format='ami')
+        images_list = self.client.list_images(disk_format='ami')
         for image in images_list:
             self.assertEqual(image['disk_format'], 'ami')
         result_set = set(map(lambda x: x['id'], images_list))
@@ -184,7 +184,7 @@
 
     @test.idempotent_id('2143655d-96d9-4bec-9188-8674206b4b3b')
     def test_index_container_format(self):
-        images_list = self.client.image_list(container_format='bare')
+        images_list = self.client.list_images(container_format='bare')
         for image in images_list:
             self.assertEqual(image['container_format'], 'bare')
         result_set = set(map(lambda x: x['id'], images_list))
@@ -193,7 +193,7 @@
 
     @test.idempotent_id('feb32ac6-22bb-4a16-afd8-9454bb714b14')
     def test_index_max_size(self):
-        images_list = self.client.image_list(size_max=42)
+        images_list = self.client.list_images(size_max=42)
         for image in images_list:
             self.assertTrue(image['size'] <= 42)
         result_set = set(map(lambda x: x['id'], images_list))
@@ -202,7 +202,7 @@
 
     @test.idempotent_id('6ffc16d0-4cbf-4401-95c8-4ac63eac34d8')
     def test_index_min_size(self):
-        images_list = self.client.image_list(size_min=142)
+        images_list = self.client.list_images(size_min=142)
         for image in images_list:
             self.assertTrue(image['size'] >= 142)
         result_set = set(map(lambda x: x['id'], images_list))
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index 32f80a2..7e538ec 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -88,7 +88,7 @@
         self.client.wait_for_resource_deletion(image_id)
 
         # Verifying deletion
-        images = self.client.image_list()
+        images = self.client.list_images()
         images_id = [item['id'] for item in images]
         self.assertNotIn(image_id, images_id)
 
@@ -164,7 +164,7 @@
         """
         Perform list action with given params and validates result.
         """
-        images_list = self.client.image_list(params=params)
+        images_list = self.client.list_images(params=params)
         # Validating params of fetched images
         for image in images_list:
             for key in params:
@@ -174,7 +174,7 @@
     @test.idempotent_id('1e341d7a-90a9-494c-b143-2cdf2aeb6aee')
     def test_index_no_params(self):
         # Simple test to see all fixture images returned
-        images_list = self.client.image_list()
+        images_list = self.client.list_images()
         image_list = map(lambda x: x['id'], images_list)
 
         for image in self.created_images:
@@ -217,7 +217,7 @@
 
         size = image['size']
         params = {"size_min": size - 500, "size_max": size + 500}
-        images_list = self.client.image_list(params=params)
+        images_list = self.client.list_images(params=params)
         image_size_list = map(lambda x: x['size'], images_list)
 
         for image_size in image_size_list:
@@ -235,7 +235,7 @@
     def test_list_images_param_limit(self):
         # Test to get images by limit
         params = {"limit": 2}
-        images_list = self.client.image_list(params=params)
+        images_list = self.client.list_images(params=params)
 
         self.assertEqual(len(images_list), params['limit'],
                          "Failed to get images by limit")
diff --git a/tempest/cmd/javelin.py b/tempest/cmd/javelin.py
index 4e2af76..d3426c6 100755
--- a/tempest/cmd/javelin.py
+++ b/tempest/cmd/javelin.py
@@ -617,7 +617,7 @@
 
 
 def _get_image_by_name(client, name):
-    body = client.images.image_list()
+    body = client.images.list_images()
     for image in body:
         if name == image['name']:
             return image
diff --git a/tempest/services/image/v1/json/image_client.py b/tempest/services/image/v1/json/image_client.py
index 5e442fa..0761d3e 100644
--- a/tempest/services/image/v1/json/image_client.py
+++ b/tempest/services/image/v1/json/image_client.py
@@ -201,7 +201,7 @@
         self.expected_success(200, resp.status)
         return service_client.ResponseBody(resp, body)
 
-    def image_list(self, **kwargs):
+    def list_images(self, **kwargs):
         url = 'v1/images'
 
         if len(kwargs) > 0:
diff --git a/tempest/services/image/v2/json/image_client.py b/tempest/services/image/v2/json/image_client.py
index aff8e85..70ed0db 100644
--- a/tempest/services/image/v2/json/image_client.py
+++ b/tempest/services/image/v2/json/image_client.py
@@ -102,7 +102,7 @@
         self.expected_success(204, resp.status)
         return service_client.ResponseBody(resp)
 
-    def image_list(self, params=None):
+    def list_images(self, params=None):
         url = 'v2/images'
 
         if params: