feature-yangtool breaks release

- feature-yangtool need to depend on all the bundles that are listed
as being part of the feature file else the maven reaction may try to
include files in the feature that are not yet been built and cannot be
fetched otherwise. Typical case of this is when you have releases
- Some pom cleanup warning

Change-Id: I27269e3cc88cea8d285fa421387869ea89ef67a5
Signed-off-by: Giovanni Meo <gmeo@cisco.com>