RPM packaging fixes

* fix therubyracer require name
* when Foreman launched twice within same PID, ENV['BUNDLE_GEMFILE'] is already
  set, causing bundler to load instead of bundler_ext
* revert SCL additions to init.d script, spec file handles them
* fix init script path
* export HOME in init script as Puppet requires it
* add gettext_i18n_rails_js dependency, minor dependency fixes to compile
  assets and match RPM versions
* create settings.yaml to precompile assets
* specify required attributes for local_secret_token.rb
* comps updates
(cherry picked from commit 6f96a1b9a2389233114a880fb8376bdf4ab9eaa0)