Brick multiplexing feature breaks when volumes have distinct user.heketi.id values configured.
Expectation is to have bricks coming up as part of same process but it does with 1:1 brick vs process ratio.
REVIEW: https://review.gluster.org/22933 (glusterd: ignore user.* options from compatibility check in brick mux) merged (#3) on master by Atin Mukherjee