Merge branch 'release/v2.1.0' into develop
Remove lobby middleware.
Update README file.
Merge branch 'feature/remove_lobby_middleware' into develop
Create switch_tenant method.
Modify connection_handler spec.
Fix specs from manager_spec.rb file.
Fix raltie with new changes of Manager module.
Merge branch 'feature/create_switch_method' into develop
Refactor of current_tenant method on Manager module.

Deprecate the determines_tenant method.
Modify establish_connection method of ActiveRecord::Base
Override activerecord database rake tasks.

Override db:create:all, db:drop:all and db:purge:all tasks
Merge branch 'feature/override_activerecord_rake_tasks' into develop
Delete ActiveRecord patches.
Delete deprecated methods.
Update README file.
Update README file.
Modify patch of ActiveRecord ConnectionHandler.
Modify tenant? method of Manager module.
Modify database rake tasks.