Refactoring: Moving Relation Annotations to relation package
Add SimpleName as Key
Rename Errors and add new error
add more test metadata

1. Invalid reference source SM          2

2. Related StateMachine                 2
3. Standalone StateMachine P            2
4. Standalone StateMachine N            1

5. Super StateMachine                   2
6. Child StateMachine P                 2
7. Child StateMachine N                 1

P1 - Standalone
   2
P2 - Child
   2

N3 - Standalone N RelatedTo invalid
   3
N1 - Relation attribute not defined in RelationSet
   3
N2 - on not matching relation
   3

NC1 - Relation attribute not defined in RelationSet (SUPER)
   3
NC2 - on not matching relation (SUPER)
   3