Create a writable directory for Drush settings

https://trello.com/c/Wvww2mJd
Automatic commit of package [openshift-origin-cartridge-jbossews] release [0.9.2-1].
Automatic commit of package [rubygem-openshift-origin-msg-broker-mcollective] release [1.14.2-1].
Automatic commit of package [rubygem-openshift-origin-node] release [1.14.2-1].
Automatic commit of package [openshift-origin-cartridge-nodejs] release [1.15.2-1].
Automatic commit of package [openshift-origin-cartridge-postgresql] release [0.7.2-1].
Automatic commit of package [openshift-origin-cartridge-python] release [0.9.2-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.14.2-1].
Automatic commit of package [openshift-origin-msg-node-mcollective] release [1.14.2-1].
Automatic commit of package [openshift-origin-util-scl] release [1.4.2-1].
Automatic commit of package [openshift-origin-msg-common] release [1.14.2-1].
Automatic commit of package [openshift-origin-cartridge-mongodb] release [1.13.2-1].
Merge pull request #3553 from VojtechVitek/drush_settings

Merged by openshift-bot