oslo.messaging context must be a dict

oslo.messaging assume the context is a dict not a RequestContext
This patch ensure this.

Closes-bug: #1275771

Change-Id: Iae58d40f171d1d5780b74b747c26a74cca05b459
Correct class when stopping partitioned alarm eval svc

Avoid traceback on service shutdown by fixing tiny copy'n'paste
error in oslo-messaging switchover.

Change-Id: I5cf7e6f46ab1d982c59f8730eea1b8e7a3bd75e9
Closes-bug: #1317184
Merge "Correct class when stopping partitioned alarm eval svc"