In order to help to distinguish Client (4xx)
and not client issues the Rest Client exceptions
moved to 3 Category:
- Client 4xx
- Server 5xx
- Other Rest Client exceptions
UnexpectedContentType exception added
to distinguish the 415 case from the Other
situation.
Change-Id: Ib7ee5ce85e14fffd28c70bb9da4fbea87a8a5903