changed WIKIA_PROD_DATACENTER to WIKIA_DATACENTER and updated the README.md

Also resolved JSHint issues and removed unused variable taskBrokerConfiguration
made the env variables values more consistent with Wikia policy
renamed options file so it match the naming convention
Merge pull request #217 from Wikia/MWEB-954

MWEB-954 Clean up before switching to deploytools plugin for Wikia Maps