Changed status tweaks for API validation and encryption

API validation topic:
 - do not set changed=True if the object did not actually change
 - deals with cases where API manipulates data before saving

Warn if encrypted data prevent accurate changed status

Handle false changed case of tower_user password
  password field not present in data

Test changed=True warning with JT/WFJT survey spec defaults
  case for list data in JSON

awx_collection/plugins/modules/tower_job_template.py

@@ -450,6 +450,8 @@ def main():
             existing_spec = module.get_endpoint(spec_endpoint)['json']
         if new_spec != existing_spec:
             module.json_output['changed'] = True
+            if existing_item and module.has_encrypted_values(existing_spec):
+                module._encrypted_changed_warning('survey_spec', existing_item, warning=True)
             on_change = update_survey
 
     if state == 'absent':