Use OPENSHIFT_*_DIR in standalone.conf

In the JBoss cartridges' standalone.conf file, use OPENSHIFT_JBOSSAS_DIR
or OPENSHIFT_JBOSSEAP_DIR as appropriate to set the value of CART_DIR.
Bug 989863

Display MySQL admin name and password for phpMyAdmin
Bug 989831 - Fix incorrect variable.
Bug 989765 - Fix output when old jboss not present in alternatives

https://bugzilla.redhat.com/show_bug.cgi?id=989765

alternatives --remove sends output to stderr if the requested
alternative to be removed doesn't exist.  Test for existence of
alternative before trying to remove it.

Also, if uninstall, cleanup the jbossas-7 alternative
Fail gracefully when 'mysql' is not present
oo-admin-ctl-user shouldn't be setting allowed_gear_sizes on domain yet
Capabilities validator should still be called
Merge pull request #3055 from Miciah/update-CART_DIR-in-standalone.conf

Merged by openshift-bot
Merge pull request #3226 from rmillner/BZ989831

Merged by openshift-bot
Bug 956859
Merge pull request #3220 from detiber/bz989765

Merged by openshift-bot
Admin console test framework and initial functional tests
Fix bug 989695: do not reallocate existing IPs during incompatible upgrade
Reinstate boosting certain gear operations.
Merge pull request #3223 from BanzaiMan/dev/hasari/bz989863

Merged by openshift-bot
Merge pull request #3231 from danmcp/master

Merged by openshift-bot
fix in scope for scaling issues
Merge pull request #3234 from pmorie/bugs/989695

Merged by openshift-bot
Merge pull request #3233 from jwforres/admin_console_testcase_coverage

Merged by openshift-bot
Merge pull request #3236 from rmillner/cgroups_fixes

Merged by openshift-bot