Remove the mock model
added new webhook param with note
Create server limit

Limiting number of servers that can be created at same time to 2.
This will reduce load on nova may hopefully reduce errors
(timeouts and ERROR state)
Merge pull request #595 from rackerlabs/remove-mock-model

Remove the mock model
Update resGetGroupManifest-webhook.json
Merge pull request #597 from MariaAbrahms/AS-132

added new webhook param with note
Merge pull request #599 from rackerlabs/as-159-create-limit

AS-159: Create server limit (reviewed, pending merge)
Merge branch 'master' into test_history_log