Migrate tempest-lib code into new lib dir

This commit migrates all of the code from tempest-lib as of it's
current HEAD, 6ad0ce42c2791a28125d38b40e7dcddf32dbeed7. The only
changes made to the tempest-lib code is to update the imports and
other references to tempest_lib. Since in it's new home it should
be tempest.lib.

Partially implements bp tempest-lib-reintegration

Change-Id: Iadc1b61953a86fa9de34e285a0bb083b1ba06fa8
diff --git a/tempest/lib/services/network/base.py b/tempest/lib/services/network/base.py
new file mode 100644
index 0000000..a6ada04
--- /dev/null
+++ b/tempest/lib/services/network/base.py
@@ -0,0 +1,71 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_serialization import jsonutils as json
+from six.moves.urllib import parse as urllib
+
+from tempest.lib.common import rest_client
+
+
+class BaseNetworkClient(rest_client.RestClient):
+
+    """Base class for Tempest REST clients for Neutron.
+
+    Child classes use v2 of the Neutron API, since the V1 API has been
+    removed from the code base.
+    """
+
+    version = '2.0'
+    uri_prefix = "v2.0"
+
+    def list_resources(self, uri, **filters):
+        req_uri = self.uri_prefix + uri
+        if filters:
+            req_uri += '?' + urllib.urlencode(filters, doseq=1)
+        resp, body = self.get(req_uri)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def delete_resource(self, uri):
+        req_uri = self.uri_prefix + uri
+        resp, body = self.delete(req_uri)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def show_resource(self, uri, **fields):
+        # fields is a dict which key is 'fields' and value is a
+        # list of field's name. An example:
+        # {'fields': ['id', 'name']}
+        req_uri = self.uri_prefix + uri
+        if fields:
+            req_uri += '?' + urllib.urlencode(fields, doseq=1)
+        resp, body = self.get(req_uri)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def create_resource(self, uri, post_data):
+        req_uri = self.uri_prefix + uri
+        req_post_data = json.dumps(post_data)
+        resp, body = self.post(req_uri, req_post_data)
+        body = json.loads(body)
+        self.expected_success(201, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def update_resource(self, uri, post_data):
+        req_uri = self.uri_prefix + uri
+        req_post_data = json.dumps(post_data)
+        resp, body = self.put(req_uri, req_post_data)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)