Support specifying which cartridges are installed on node

The openshift.sh script supports specifying cartridges installed. The
CONF_CARTRIDGES env variable support a comma-separated list or a class
of cartriges "all" or "standard." A prepended minus sign '-' in a list
of carts will negate the list.

Change-Id: I6ae0d29bc397b51a5b7353b8b51bf5d2b1fcba7b
Merge "Support specifying which cartridges are installed on node"