Revert "Multi-master start race condition"

This reverts commit b3f81ca487c5984b72bb0101ccc1d9f786613fee.

Allow multi-master minion to start if not all masters are available
Revert "Allow schedules to work in multimaster."

This reverts commit 612a77e34263b07b82da510408c043f5c51213b6.

Don't blow up if one of the masters can't be contacted
Re-fix allow schedules to work in multi-master

This fixes the same bug as PR #13189 but without breaking multi-master
when one of the masters is unavailable.
Make the rpom build script work properly with a different salt installed