Revert "ha: Fix initial DB sync"

This reverts commit 962198b98e20203fe3740de8d5b46b9668864ecd.

Reverting this to implement a solution that's more aligned with how we do it
for the other services. When trying this before we simply used the wrong
command for doing the migrations.
Fix command for doing neutron db migration

The old command we used doesn't execute any migrations it just verified that
the installed migrations do not contain any branches.
Merge pull request #135 from rhafer/db-sync

(re)fix initial db sync for HA