Class `Managers` from `glanceclient.common.base` module is similar to
class `apiclient:ManagerWithFind` from common code.
In this patch:
- class glanceclient.common.base:Managers replaced by
apiclient:ManagerWithFind
- module glanceclient.common.base marked as 'deprecated'
Related to bp common-client-library-2
Change-Id: I41da4a9188e97ca2c07b6234fc2ac0a877553d3f