make stack creation return json response

added a serializer to handle create response serialization

fixes bug #1187883

Change-Id: Ibdeb8b810d759901979becb8b29bdc337f2f5bec
Fixup some trivial license header mismatches

Newer Hacking releases are pedantic about the
license header. Fix up the trivial mismatch.

Change-Id: I418222734303b8578ab0b34b8eb044d9543fc888
Emit alarm actions if a rule remains in ALARM state.

It looks like the original intent of this edge-triggering was to
prevent actions being emitted too frequently, causing overshoot of
scaling resources.

However this causes an issue when one scaling resource change is not
enough to bring the alarm state under the threshold.

Proper use of Period, EvaluationPeriods and Threshold should be sufficient
to prevent scaling resource overshoot.

Fixes bug: #1193970

Change-Id: I5b38eb82cd1ad568fe4af77999e9d52f9eb99328
Merge "make stack creation return json response"
Merge "Emit alarm actions if a rule remains in ALARM state."
Merge "Fixup some trivial license header mismatches"
Merge branch 'master' into bp-dev/rackspace-cloud-servers-provider