Bug 1261565 - Allow docker-storage-setup.sh to be run n-times
Bug 1261565 - Allow docker-storage-setup.sh to be run n-times

Currently docker-storage-setup.sh can only be successfully
run once if the DEVS element is provided in the configuration file.
Additional runs of the script fail and the service enters the failed
state. This commit allows additional runs to not report the
spurious error.

* Run pvs to check if device is already part of volume group
* query the current volume groups and partitions to allow
  docker-storage-setup.sh to configure un-partitioned devices
* Tag all messages to user as ERROR or INFO
* Ensure that all messages are emitted on STDERR

thescriptbender/container-storage-setup,shishir-a412ed/docker-storage-setup