Change ff6b9998bb977421a5cbc94878ced8542d910c9e enforces in
a database migration that you've run the simple_cell_setup
command for cells v2 but the instructions in the error and
in the release note said to use 'nova-manage db' when it should
be 'nova-manage cell_v2'.
Change-Id: I8e71d1c7022d1000f26b7c16ed1c56f6e87ab8ac
Closes-Bug: #1649341