Don't allow "propagate" of heatclient logger

Unlike other project, if we specified "--debug" in heatclient, it will
display duplicate debug info. This is because the "propagate" of
heatclient logger is True as default.

Change-Id: Ia15878690e5ff0f29f7a11c044a66677af2909ee
Closes-Bug: #1320789
Merge "Don't allow "propagate" of heatclient logger"