Allow network descriptors without endpoints
Added convenience creation method
Added exception
Added exception to creation
Added core as dependency
Renamed resource mapping capability
Implemented the request's mapping capability
Moved wrappers in separate classes
Merge branch 'master' of https://github.com/dana-i2cat/mqnaas

Conflicts:
	extensions/pom.xml
Merge pull request #100 from shummi/master

Added reqeust resource mapping, started work on network creation logic