Compare architectures feature

See merge request !2

Also modified foundational constraints. Changed constraints for OSS and RSE. Added the ability to check constraints on associations in case of PBE pattern. 

Added validation rules for Partner BasedEcosystem. Added features for testing, repository mining, access permission to extensions. Added quality check as business decision. Added attributes to access permissions. Changed Store and Extension implementation so that they are now not contained within each other.

Addition of evaluation table for two features(Rating, ranking) with computation of their respective weights based on AHP. However, value of weight is not persistent.
Addition of java service to change the value of weight to a constant when a new feature is created.