OR-450 add cretor field to the OAuthClient model
OR-450 set creator field at OauthClient creation
Merge pull request #350 in OR/rse from OR/rse-gcrosmarie:OR-450-oauthclientschema-does-not-contain to master

* commit 'cddf8b2ad31b35c4f14679381d76d6649e0f69e0':
  OR-450 set creator field at OauthClient creation
  OR-450 add cretor field to the OAuthClient model