---
fixes:
  - |
    As documented in launchpad bug 1708680 the templates for manila with the
    "generic" back end do not yield a successful manila deployment even if
    they do not cause the overall overcloud deployment to fail, so we are
    dropping these faulty and unmaintained manila "generic" back end templates.

Add reno for manila generic driver removal
Add reno for manila generic driver removal

A recent change [1] removed dysfunctional environment templates
for manila with the "generic" back end.  Add a release note for
same.

[1] I2e1db2bd614eae65e59712f50dc3391f16f6b388

Change-Id: Iaca0250361055d5175fc93814334cd393e959395
