Switching mcollective to use the activemq plugin

The stomp plugin is technically deprecated.  The activemq plugin still uses the
stomp protocol.  The biggest difference I see is the different default
settings.  By default the activemq connector's retry algorithm uses an
exponential backoff with a maximum of 30 seconds.  Previously the stomp
connector would retry every 5 seconds if the connection was severed.
Add support for GSS-TSIG configuration.

Add support for configuration variables CONF_BIND_KRB_KEYTAB
and CONF_BIND_KRB_PRINCIPAL to configure Kerberos based nsupdate
operation in openshift-origin-dns-nsupdate.conf