Fix JBoss installation issue (metrics)

Fix JBoss installation issue caused by having the JBoss cartridges
depend on the jboss-openshift-metrics-module package. Installing the
metrics module first causes /etc/alternatives/jboss{as-7,eap-6} to be
created as a real directory, instead of as a symlink, which results in
the cartridge failing to start.
Merge pull request #5358 from ncdc/fix-jboss-metrics

Merged by openshift-bot
Automatic commit of package [openshift-origin-cartridge-jbosseap] release [2.17.4-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.24.5-1].
Automatic commit of package [rubygem-openshift-origin-frontend-apache-vhost] release [0.6.3-1].
Automatic commit of package [rubygem-openshift-origin-console] release [1.24.3-1].
Automatic commit of package [openshift-origin-cartridge-jbossas] release [1.24.4-1].
Automatic commit of package [openshift-origin-cartridge-dependencies] release [1.24.3-1].
Automatic commit of package [openshift-origin-broker-util] release [1.24.3-1].