Created Network Service Functions Features

As discussed,
The ADSAL NSFs have a bad inter-dependencies amongst each other and the current set of Feature splits will not work.
We can consider all the interdependent (bidirectional dependencies) bundles as a whole and install them as odl-nsf-managers and not expose individual features.
Once we redesign the NSFs to become proper components, we can define individual features.

Also fixed the pom hierarchy.

Sample :
opendaylight-user@root>feature:list | grep odl
odl-nsf-all                    | 1.4.2-SNAPSHOT      | x         | nsf-1.4.2-SNAPSHOT                    | OpenDaylight :: NSF :: All Network Service Functio
odl-nsf-managers               | 1.4.2-SNAPSHOT      | x         | nsf-1.4.2-SNAPSHOT                    | OpenDaylight :: AD-SAL :: Network Service Function
odl-adsal-northbound           | 1.4.2-SNAPSHOT      | x         | nsf-1.4.2-SNAPSHOT                    | OpenDaylight :: AD-SAL :: Northbound APIs

Change-Id: Id58223686d2dd345c9bfcdf4162ad105a621b616
Signed-off-by: Mathieu Lemay <mlemay@inocybe.com>
Signed-off-by: Ed Warnicke <eaw@cisco.com>
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>
Merge "Created Network Service Functions Features"