For all cinder commands, the error message returned by the cinder
service is gobbled by keystoneclient as raise_exc is enabled by
default and it doesn't have the knowledge of how to interpret
exception returned by the cinder service correctly.
Set raise_exc to False explicitly in request method of cinderclient
and pass it to the keystoneclient session request method so that
keystoneclient raises exception only when the exception is raised
by the keystone server else cinderclient should interpret the
exception returned by the cinder service.
Closes-Bug: 1431693
Closes-Bug: 1428764
Change-Id: I1160a2c998919b669c39a4b739e83f5bd9d8d235
de36755657