OR-637 remove whatsUp module dependency from messages controller
OR-637 add findByIds method in the generic message module
Merge pull request #439 in OR/rse from OR/rse-gcrosmarie:OR-637-Some-messages-API-are-still-whatsup-specific to master

* commit '46557f8bbbf10e48582ee4d2a612ab38e456709d':
  OR-637 add findByIds method in the generic message module
  OR-637 remove whatsUp module dependency from messages controller