Add parameters verification when Audit is being created

We have to check Audit Type and Audit State to make sure
these parameters are in valid status.

Also, we provide default states for the next attributes:

- 'audit_template' is required and should be either UUID or text field
- 'state' is readonly so it raises an error if submitted in POST
  and is set by default to PENDING
- 'deadline' is optional and should be a datetime
- 'type' is a required text field

Change-Id: I2a7e0deec0ee2040e86400b500bb0efd8eade564
Closes-Bug: #1532843
Closes-Bug: #1533210

watcher_tempest_plugin/tests/scenario/base.py

@@ -24,8 +24,8 @@ from oslo_log import log
 
 from tempest import config
 from tempest import exceptions
+from tempest.lib.common.utils import data_utils
 from tempest.scenario import manager
-from tempest_lib.common.utils import data_utils
 
 from watcher_tempest_plugin import infra_optim_clients as clients
 
@@ -114,7 +114,7 @@ class BaseInfraOptimScenarioTest(manager.ScenarioTest):
     # ### AUDITS ### #
 
     def create_audit(self, audit_template_uuid, type='ONESHOT',
-                     state='PENDING', deadline=None):
+                     state=None, deadline=None):
         """Wrapper utility for creating a test audit
 
         :param audit_template_uuid: Audit Template UUID this audit will use