Updated openstack/openstack
Project: openstack/nova  13e98301ff36d67cd5ef184771598c653ff1c45b

Update docstring for check_instance_shared_storage_local

The check_instance_shared_storage_local method is getting
a nova instance object so update the docstring to reflect
that.

Part of blueprint kilo-objects

Change-Id: I2fe671f47bc73e5bf292abce7ba678e1cf59e6d9