cleanup: removing tenant local copy of base-instance-vocabularies and instead use a tenant domain-instance-vocabularies file to track additions; adding trivial comments; removing unused hidden files
cleanup: removing local-walkerart-settings.xml from being committed any further to the repo. A local copy will live on the development and production servers, which will maintain separate configurations pertinent to the server. Also: removing nightly-settings; and updating app layer build file to remove redundant build step w.r.t. tenant config file.