NCL provisioner skeleton + mockup.

Creates a new bundle (ofertie.ncl) with OFERTIE NCL provisioner and a mockup implementation for it.

- INCLProvisioner defines the NCL API.
- NCLProvisionerMockup is a mockup implementation of the API.
- blueprint.xml causes OSGi container to instantiate NCLProvisionerMockup an export it as an OSGi service using INCLProvisioner interface.

- pom.xml maven-bundle-plugin configuration causes the bundle to export provisioner API, so it is availabe to other bundles.

- extensions/bundles/pom.xml has been updated to include the new bundle.
Define opennas-ofertie-ncl feature.
XML serializable provisioner api model.

- @XmlRootElement and @XmlAccessorType annotations
- Changed an attribute name in Flow.java to match conventions.
Export provisioner API through WS using DOSGi.

Default URL is:
http://localhost:8888/opennaas/ofertie/ncl/flows
Provisioner model serialization tests.
Remove duplicated file :S
Merge pull request #640 from isartcanyameres/feature/ofertie-ncl-provisioner

Feature/ofertie ncl provisioner