Heat's recent policy changes reduced the scope of context_is_admin
to be super user privileged which affects Tacker for auto flavor
creation.
Handle devstack script changes to modify OS::Nova::Flavor rule to
'admin' role only in heat's policy.json. Modify manual installation
guide to incorporate these additional steps.
Co-Authored-By: Bharath Thiruveedula <bharath_ves@hotmail.com>
Change-Id: I7aceb21cbfaa6c45efa5c815a9bf7a0a26babc77
Closes-Bug: #1595311
496f946ef3