Remove unused blobs from bosh release

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
Upgrade ruby to 2.1.2 in bosh release

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
ignore prepare message errors from the agent

Signed-off-by: dmitriy kalinin <dmitriy@pivotallabs.com>