Annotated all the other exception mappers with @Provider to simplify the WildcardExceptionMapper.

https://www.pivotaltracker.com/s/projects/684825/stories/78554672
Added exception mappers as the first step to simplify the WildcardExceptionMapper.


I would expect that once you add @Provider to the class:
AccessDeniedExceptionMapper.java

...that you should be able to remove the "if" clauses for all of the classes here that are handled by exception-mappers, i.e.:
- AccessDeniedExceptionMapper
- AccessControlExceptionMapper
- LockExceptionMapper
- TransactionMissingExceptionMapper
- JsonParseExceptionMapper
- RepositoryExceptionMapper