API Tempest tests on Audits

This patchset adds CRUD tests on Audits via the API.
Many of them are currently skipped as they revealed some underlying
bugs which are referenced on launchpad.

Partially Implements: blueprint tempest-basic-set-up
Change-Id: I5769f601f9d1cb94bb541959f94f0fa2e17d15c9

watcher_tempest_plugin/tests/api/admin/base.py

@@ -24,7 +24,7 @@ from watcher_tempest_plugin import infra_optim_clients as clients
 
 # Resources must be deleted in a specific order, this list
 # defines the resource types to clean up, and the correct order.
-RESOURCE_TYPES = ['audit_template']
+RESOURCE_TYPES = ['audit_template', 'audit']
 # RESOURCE_TYPES = ['action', 'action_plan', 'audit', 'audit_template']
 
 
@@ -137,3 +137,36 @@ class BaseInfraOptimTest(test.BaseTestCase):
             cls.created_objects['audit_template'].remove(uuid)
 
         return resp
+
+    # ### AUDITS ### #
+
+    @classmethod
+    @creates('audit')
+    def create_audit(cls, audit_template_uuid, type='ONESHOT',
+                     state='PENDING', deadline=None):
+        """Wrapper utility for creating a test audit
+
+        :param audit_template_uuid: Audit Template UUID this audit will use
+        :param type: Audit type (either ONESHOT or CONTINUOUS)
+        :param state: Audit state (str)
+        :param deadline: Audit deadline (datetime)
+        :return: A tuple with The HTTP response and its body
+        """
+        resp, body = cls.client.create_audit(
+            audit_template_uuid=audit_template_uuid, type=type,
+            state=state, deadline=deadline)
+        return resp, body
+
+    @classmethod
+    def delete_audit(cls, audit_uuid):
+        """Deletes an audit having the specified UUID
+
+        :param audit_uuid: The unique identifier of the audit.
+        :return: the HTTP response
+        """
+        resp, body = cls.client.delete_audit(audit_uuid)
+
+        if audit_uuid in cls.created_objects['audit']:
+            cls.created_objects['audit'].remove(audit_uuid)
+
+        return resp