oo-install Guide: Added info on new -l CLI option
Fix raise during initial deployment meta creation

Add a File.exists? check to prevent File.stat from raising when
no deployment metadata yet exists and allow defaults to be
written.

Resolve bug https://bugzilla.redhat.com/show_bug.cgi?id=1075673
Merge pull request #5093 from nhr/oo_install_guide_update

Merged by openshift-bot
Automatic commit of package [openshift-origin-cartridge-phpmyadmin] release [1.19.5-1].
Automatic commit of package [rubygem-openshift-origin-node] release [1.22.9-1].
Automatic commit of package [openshift-origin-cartridge-haproxy] release [1.22.4-1].
Automatic commit of package [openshift-origin-cartridge-jbosseap] release [2.15.5-1].
Automatic commit of package [openshift-origin-cartridge-jbossews] release [1.21.5-1].
Automatic commit of package [openshift-origin-cartridge-postgresql] release [1.22.4-1].
Automatic commit of package [openshift-origin-cartridge-jenkins] release [1.19.4-1].
Automatic commit of package [openshift-origin-cartridge-mysql] release [1.22.4-1].
Automatic commit of package [rubygem-openshift-origin-msg-broker-mcollective] release [1.22.7-1].
Automatic commit of package [openshift-origin-cartridge-php] release [1.22.5-1].
Automatic commit of package [openshift-origin-cartridge-mongodb] release [1.18.6-1].
Automatic commit of package [openshift-origin-cartridge-python] release [1.22.5-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.22.8-1].
Automatic commit of package [openshift-origin-cartridge-jbossas] release [1.22.4-1].
Automatic commit of package [openshift-origin-cartridge-diy] release [1.20.3-1].
Automatic commit of package [rubygem-openshift-origin-common] release [1.21.6-1].
Automatic commit of package [openshift-origin-cartridge-ruby] release [1.22.5-1].