Code review comment for ~ilasc/launchpad:bug-1852482

Adding:
   1. non-ASCII character in the displayname of non owner user for Webservice Unit Test
   2. and UTF-8 encoding in creation of GitRepositoryCreatorNotOwner and GitRepositoryCreatorNotMemberOfOwnerTeam exceptions

seems to do the trick.

Now getting below output:

HTTP/1.1 400 Bad Request
Content-Length: 77
Content-Type: text/plain

Person-name-100002 cannot create Git repositories owned by André Luís Lopes

MP now ready for review / new direction suggestions.