The porting to mock of sahara-dashboard is complete.
This fulfills the community goal
"Remove Use of mox/mox3 for Testing" set for Rocky:
https://governance.openstack.org/tc/goals/rocky/mox_removal.html
Raise the requirement to the Rocky M2 release of Horizon,
which drops the usage of mox by default (it should be
explicitly enabled). Without a forced import from Horizon
the mox dependencies can be dropped here.
Bump also a dependency needed by this new version of Horizon.
Change-Id: Iaf272af9919f8a69562c0a469130bbf8628936cf
56b69d6477