Increment targeted release version to 0.12.0
Increment targeted release version to 0.12.0

This patch increments the next, targeted release version to 0.12.0.

codedellemc/rexray,thecodeteam/rexray,thecodeteam/rexray,thecodeteam/rexray,akutz/rexray,akutz/rexray,akutz/rexray,akutz/rexray,akutz/rexray,codedellemc/rexray,emccode/rexray,thecodeteam/rexray,emccode/rexray,thecodeteam/rexray,akutz/rexray,codedellemc/rexray,codedellemc/rexray,thecodeteam/rexray,codedellemc/rexray,emccode/rexray,codedellemc/rexray,emccode/rexray