Fix key error when create lpar instance failed
Fix key error when create lpar instance failed

With existing code, when create lpar instance
failed, it throws a key error because the parameter
is not being passed to PowerVMLPARCreationFailed
function in exception module.

The fix for this is that in module operator, passing
the 'instance_name' to the called function in exception
module.

Fixes bug 1173303
Change-Id: I688eecf7b649b67ca62f72d6d33fd7cd774047c3

n0ano/ganttclient