Revert "#130 - Added the new oauth2_provider as a gem."

This reverts commit 595d32456558b4173aa670de868d18bbcf8c75c8.

Conflicts:
	server/webapp/WEB-INF/rails.new/Gemfile
	server/webapp/WEB-INF/rails.new/Gemfile.lock
	server/webapp/WEB-INF/rails.new/vendor/bundle/bundler/setup.rb
	server/webapp/WEB-INF/rails.new/vendor/engines/oauth2_provider/oauth2_provider.gemspec
Updating Gemfile.lock with 1.0.1 version of the oauth2_provider engine