Rework nova modules and states

Closes-issue: https://mirantis.jira.com/browse/PROD-20787
Change-Id: If9ea6ff8c53c876e678180c3df3792d198df2ec0
diff --git a/_modules/novav21/quotas.py b/_modules/novav21/quotas.py
new file mode 100644
index 0000000..3b303f2
--- /dev/null
+++ b/_modules/novav21/quotas.py
@@ -0,0 +1,48 @@
+#    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.
+
+import common
+
+# Function alias to not shadow built-ins
+__func_alias__ = {
+    'list_': 'list'
+}
+
+
+@common.function_descriptor('delete', 'Project quota')
+@common.send('get')
+def delete(project_id, user_id=None, **kwargs):
+    """List quotas of a project (and user)"""
+    url = '/os-quota-sets/%s' % project_id
+    if user_id:
+        url = '%s?user_id=%s' % (url, user_id)
+    return url, {}
+
+
+@common.function_descriptor('find', 'Project quota', 'quota_set')
+@common.send('get')
+def list_(project_id, user_id=None, **kwargs):
+    """List quotas of a project (and user)"""
+    url = '/os-quota-sets/%s' % project_id
+    if user_id:
+        url = '%s?user_id=%s' % (url, user_id)
+    return url, {}
+
+
+@common.function_descriptor('update', 'Project quota', 'quota_set')
+@common.send('put')
+def update(project_id, user_id=None, **kwargs):
+    """Update quota of the specified project (and user)"""
+    url = '/os-quota-sets/%s' % project_id
+    if user_id:
+        url = '%s?user_id=%s' % (url, user_id)
+    return url, {'json': {'quota_set': kwargs}}