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.
<node-proxy> Update requires to use scl where appropriate

Update init script to reference scl modules instead of system modules
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
Merge pull request #4034 from detiber/nodeProxySpecFix

Merged by openshift-bot
add max connections to tunables