[RO]made a new record synonym function to return the synonym model with the boolean output
[WIP][issue #83] code modified and new function added
[WIP][issue #83] code modified to satisfy code conventions, and validation messages has been added
[WIP][issue #83] UML added
[WIP][issue #83] tests modified
[WIP][issue #83]default value for approved have been modified
[WIP][issue #83]UML modified
Merge pull request #379 from MGhanem/Omar-Hossam_C4F3RO

C4F3 - Feature, record suggested synonym for a given word