Remove positive tag

The positive tag/type remained in tempest from the distant past,
every non negative test is positive, we do not need a positive tag.

The positive tags are removed in order to avoid future confusion.

Change-Id: I433dcee242186d1b5459d09b06b76b22a14c847d
diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index 849cebb..af76ad0 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -33,13 +33,13 @@
         cls.client = cls.os_adm.hosts_client
         cls.non_admin_client = cls.os.hosts_client
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_list_hosts(self):
         resp, hosts = self.client.list_hosts()
         self.assertEqual(200, resp.status)
         self.assertTrue(len(hosts) >= 2)
 
-    @attr(type='positive')
+    @attr(type='gate')
     def test_list_hosts_with_zone(self):
         resp, hosts = self.client.list_hosts()
         host = hosts[0]
diff --git a/tempest/api/compute/admin/test_hypervisor.py b/tempest/api/compute/admin/test_hypervisor.py
index 00a5955..5ca16f4 100644
--- a/tempest/api/compute/admin/test_hypervisor.py
+++ b/tempest/api/compute/admin/test_hypervisor.py
@@ -40,20 +40,20 @@
         self.assertEqual(200, resp.status)
         return hypers
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_list(self):
         # List of hypervisor and available hypervisors hostname
         hypers = self._list_hypervisors()
         self.assertTrue(len(hypers) > 0)
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_list_details(self):
         # Display the details of the all hypervisor
         resp, hypers = self.client.get_hypervisor_list_details()
         self.assertEqual(200, resp.status)
         self.assertTrue(len(hypers) > 0)
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_show_details(self):
         # Display the details of the specified hypervisor
         hypers = self._list_hypervisors()
@@ -66,7 +66,7 @@
         self.assertEqual(details['hypervisor_hostname'],
                          hypers[0]['hypervisor_hostname'])
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_show_servers(self):
         # Show instances about the specific hypervisors
         hypers = self._list_hypervisors()
@@ -77,14 +77,14 @@
         self.assertEqual(200, resp.status)
         self.assertTrue(len(hypervisors) > 0)
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_stats(self):
         # Verify the stats of the all hypervisor
         resp, stats = self.client.get_hypervisor_stats()
         self.assertEqual(200, resp.status)
         self.assertTrue(len(stats) > 0)
 
-    @attr(type=['positive', 'gate'])
+    @attr(type='gate')
     def test_get_hypervisor_uptime(self):
         # Verify that GET shows the specified hypervisor uptime
         hypers = self._list_hypervisors()