Fix field type to audit_type

There's a number of places where a field of an object is named "type",
which isn't good thing. Actually type is keyword in python, so wherever
I found type used in models/api/object/test, I have fixed it to
audit_type in the audit files

Change-Id: Iea6bd3acb0b2af2a833b3916701aad88f6064bba
Closes-Bug: #1533392

watcher_tempest_plugin/tests/api/admin/test_audit_template.py

@@ -58,7 +58,7 @@ class TestCreateDeleteAuditTemplate(base.BaseInfraOptimTest):
 
     @test.attr(type='smoke')
     def test_create_audit_template_unicode_description(self):
-        goal_name = "DUMMY"
+        goal_name = "dummy"
         _, goal = self.client.show_goal(goal_name)
         # Use a unicode string for testing:
         params = {