Add secondary lvm backend for manila

This change is nesessary for manila scenario tempest tests
manila_tempest_tests.tests.scenario.test_share_basic_ops.TestShareBasicOpsNFS
For more ditails please take a look
https://mirantis.jira.com/browse/PROD-19169

Change-Id: Ib3db105dd3f6346cde262cae7e5b6f44b01ec766
Closes-Issue: https://mirantis.jira.com/browse/PROD-19169
10 files changed