Adding a help message to the mock provisioner and an option for
having it occasionally fail a task. Also fixing a bug where the
load data scripts cause the overall standalone script to exit.
Merge remote-tracking branch 'origin/develop' into feature/mock-improvements

Conflicts:
	standalone/bin/loom.sh
Merge pull request #551 from continuuity/feature/mock-improvements

Adding a help message to the mock provisioner and an option for