<install> fixes and explanation for HA MongoDB

* document the need to run the replica set config step after all
replicants are available
* try to catch error conditions with replica set config
* fix problem with adding port spec to replicants
* remove other "search" entries from /etc/resolv.conf
so that new non-FQDNs have a better chance of resolving
* minor rearrangement of docs, discussion of DNS setup
Merge pull request #218 from brenton/enterprise-1.2

Working around bugs in cloud-init
<oo-install> create with parity to master commit b8937be5f642cbdce94ad3f2d58cc0b7ca2cde63
remove redundant openshift-origin-cartridge-jbosseap from cart list
Merge pull request #236 from sosiouxme/enterprise-1.2

remove redundant openshift-origin-cartridge-jbosseap from cart list
Mods to improve the VM experience
Minor fix to VM client tutorial
DNS config parser correctly identifies register_components values
Less over-engineered @register_components test
Merge pull request #241 from nhr/enterprise-1.2

Various bug fixes for enterprise-1.2 oo-install
<install> update activemq.xml example file

There were some minor policy updates that help with certain edge cases.
The openshift.ks script was updated but not this example file which the
documentation still refers to.
<install> update activemq-network.xml example
Fixed htpasswd creation to correctly invoke SSH
Merge pull request #246 from nhr/enterprise-1.2

Fixed htpasswd creation to correctly invoke SSH
Adding support for the SCL