removes newrlic addon, configures a newrelic licensekey as a default config var,
adds nr license key method to clientapp
adds back newrelic start addon
configures after addons are added,
i need to do this so that the newrelic key does not get overridden by the add on setup
Merge pull request #46 from G5/newrelic-77336420

configures a newrelic license_key as a default config var