Updated Karaf distribution.

This patch added the following two features into VTN local Karaf
distribution.
 - features-adsal-compatibility
 - features-openflowplugin

The two features are needed for testing VTN Manager.
The above two features and vtn features are configured as bootFeatures
so that these are installed as startup.

Change-Id: If69fadaeff3e25730a88606c8897c58e9b1f4f0c
Signed-off-by: Hideyuki Tai <Hideyuki.Tai@necam.com>