Use javax.ws.rs constants instead of raw Strings.
Use else-if, instead of multiple if.
Add Logger and replace prints.
Add Produces annotation if there is an annotated return type.
Merge branch 'master' of https://github.com/dana-i2cat/mqnaas into api/improvements
Add XML annotations.
Add proper XML namespace.
Avoid returning null in API MethodMapper.
Add XML annotations.
Merge pull request #127 from logoff/api/improvements

Improvements in REST API