Make oslo.messaging gating on devstack/tempest

oslo.messaging from git is going to be used in our devstack/tempest
runs, so ensure that we're gating on it in a matrix of configurations
that cover all they ways that an oslo.messaging compatibility problem
could cause a project fail, which could wedge the gate.

See I2ee6acd0073b284ab6ba61fc211562ccf55a5320 for where we did the same
for oslo.config.

Change-Id: Ib2513c55c54df0d54155e369dc6dbe25193f63fb
Merge "Make oslo.messaging gating on devstack/tempest"