PR comments addressed.

- Converted copy_objects_form view to haml.
- Refactored code to address PR comments.
- Renamed methods in miq_ae_domain model and fixed them to exclude domain records with system value as NULL or false.
- Added new model method "copy" to miq_ae_instance, miq_ae_method, miq_ae_class models to clean up controller code and be called from controller to save copied objects.
- Fixed spec tests to call newly renamed methods, and fixed Product Features count in miq_product_feature_spec.rb

Issue #105