ASGARD-1218 - update Grails wrapper for Grails 2.2.4
Make this unit test pass when run via grailsw test-app
Merge pull request #367 from joesondow/ASGARD-1218-grailsw-2.2.4

ASGARD-1218 - update Grails wrapper for Grails 2.2.4
ASGARD-612 - ASG force delete buttons should start long-running task to wait for deletion to finish
rename instanceStillExists to asgStillExists
Merge pull request #368 from jgritman/wait-for-delete-asg

ASGARD-612 - ASG force delete buttons should start long-running task to ...
ASGARD-1219 - Fix NullPointerException in /show/task/123doesntexist

Added unit test for "not found" case.

The error message won't match logically for the workflowId/runId case, but we plan to remove that case soon anyway.
Merge pull request #369 from joesondow/ASGARD-1219-Fix-Task-NPE

ASGARD-1219 - Fix NullPointerException in /task/show/123doesntexist
Merge branch 'master' of https://github.com/Netflix/asgard