Reauthenticate novaclient to ensure token is still valid.
Closes-Bug: 1335854

Add availability zone for service instance VM launch
Closes-Bug: 1341455

Update log messages. Add additional check for service vm/netns
already created VM fq_name should not contain ':' since it is a
top level object. ':' is used as a delimiter and hence backend
parsing breaks for VM. Plan is to generate an error from backend
for such cases and prevent the write from going through.

Change-Id: I7a6d094c8eb0a86a7c91f3f5733ce6c1227f8165
Merge "Reauthenticate novaclient to ensure token is still valid. Closes-Bug: 1335854" into R1.10