The items of remote_client methods were unreadable, so this patch makes it readable. Change-Id: I40688fe5e7151dde48c6be0124c2c621f02de585 Ref: https://docs.openstack.org/releasenotes/tempest/unreleased.html
remote_client under tempest.common is used in many projects but the module is not defined as stable. This patch adds the essential part of the module into tempest.lib as stable interface. Change-Id: Idb2206c239f25bc8b8530275e84c834233b9544b