Merge pull request #67 from shummi/master

Shortened names
Create network bundle in mqnaas.
Merge pull request #68 from shummi/master

This pull requests adds a generic model for topologies, infrastructures and network requests to the core, which contains of a set of management capabilities and administration capabilities, that build the distributed model necessary.
Merge branch 'master' of https://github.com/dana-i2cat/mqnaas into feature/topology
Create network sub-bundles for api and implementation.
Move topology APIS to network.api bundle.
Move network capabilities implementations to network.impl bundle.
Move infrastructures api to network.api bundle
Move network to new independent folder: extensions.
Add network features.
Export slice package in core.api
Merge pull request #70 from adrian-rosello/feature/topology

refactor/network-bundle
Extended slice administration