add ipv6 support to oo-register-dns

thanks to Magnus919bis on irc for the idea
Update oo_deployment_guide_comprehensive.adoc

yum install -y mongodb-server didn't actually install the mongodb package as a dependency, and I had to install it separately. Therefore I have added mongodb to the yum install line to save time/troubleshooting for others.
<docs> Added libmongodb to the yum install command for MongoDB
Some rest-domains.feature tests rely on DEFAULT_MAX_DOMAINS = 1

Update the user's max domain value instead of relying on the broker.conf
default value.
Merge pull request #3402 from mscherer/feature/broker/ipv6

Merged by openshift-bot
Enabling jenkins can throw an exception if the jenkins server was
deleted after the enable jenkins page was loaded.
Merge pull request #3953 from keirwhitlock/docupdates

Merged by openshift-bot
Merge pull request #4073 from detiber/brokerExtendedTests

Merged by openshift-bot
Merge pull request #4079 from jwforres/enable_jenkins_bug

Merged by openshift-bot