Fix occ-control terminations

1. Ensure PowerMode object created before attempting to use
2. Only call setChassisAssociation after getting successful temperature
reading.

Tested on Everest hw

Change-Id: I308c072cf5ab0235086c136ba7644125de0a8c6a
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
5 files changed