Remove repeated wrappers for Slices and units. Comment nitos related info in test.
Merge branch 'master' of https://github.com/dana-i2cat/mqnaas into fix/remove-repeated-wrapper

Conflicts:
	extensions/network/network.impl/src/main/java/org/mqnaas/network/impl/Network.java
	extensions/network/network.impl/src/main/java/org/mqnaas/network/impl/NetworkManagement.java
Merge pull request #132 from adrian-rosello/fix/remove-repeated-wrapper

Remove repeated wrappers for Slices and units. Comment nitos related info in test