avoid NullPointerException when actionName is null
Merge pull request #1 from djsutho/patch-1

avoid NullPointerException when actionName is null
Wrote test for null action name
Bumped version for 0.6.6 release
Fixed bug where, when using run-app, the MetricsFilter was throwing exceptions since no MetricsRegistry was available. I've just made this null-safe for now, if metrics in dev mode are needed then this can be reviewed later.
Bumped for 0.6.7 release