Allow to pass cinderv3 internal params

This patch allows to pass number of retries to cinderv3 module
via connection_params.

cinder:
  controller:
    client:
      connection_params:
        connect_retries: 2
        connect_retry_delay: 10
  client:
    connection_params:
      connect_retries: 2
      connect_retry_delay: 10

 * Remove dead code from cinder.client
 * Increase default retries to 60sec

Change-Id: I27aa89d95ac82b12fcb919f74e09877fb01e96de
Related-Prod: PROD-25982
6 files changed