Branch: master

      Due to a mistake in syntax Heroku environment variable value set was not being
      picked up by the application.Fixed the same.

============= Updated

     /config/settings.yml
      - Replaced
          mail_settings_available: ENV['MAIL_SETTINGS_AVAILABLE']
        WITH
          mail_settings_available: <%= ENV['MAIL_SETTINGS_AVAILABLE'] %>

        Note the ERB syntax <%= %> to print a value to stream.