tree 2dca64413c5a03f6a50b40bdfbd156e62dd20d28
parent 09f926310b5444c7a6969befcb6699e5a62bc8af
author zhufl <zhu.fanglei@zte.com.cn> 1497851848 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1499216165 +0000

Move base_client from volume.v3 to volume

Now exists multiple inheritance when adding new interfaces in
volume v3 clients, e.g., if we want to add show_volume_summary
in volume v3 VolumesClient, we have to make volume.v3.VolumesClient
inherit from both volume.v3.base_client.BaseClient and volume.v2.
volumes_client.VolumesClient, and this situation will repeat
everytime we add new interfaces in volume v3 clients based on v2
clients.
This is to move volume.v3.base_client to volume, and if we want to
add new interfaces based on a v2 client, we can make that v2 client
inherit from volume.base_client.BaseClient to get microversion support,
and then to make the new v3 client inherit from the v2 client, thus
to avoid the multiple inheritance.

Change-Id: I645ae35daebd924c4c4523163e5419cc050bb0ed