RUD using name -> RUD using id,  project MtoM manager, test codes added

Added & Modified
1. RUD using name -> RUD using id
2. try…finally -> assert…
3. project MtoM manager and test codes
4. some restrictions and validation added 
5. test codes added

Require
1. Project MtoM delete relation method
2. Test codes added and modified more precise
3. Request to join team & project View, Template