config subsystem integration - BUG 541

added configuration xml for configSubsystem
added sal code generator
changed reference to swichConnectionProvider (now there is collection)
changed startup in order to use configSubsystem wiring
preserved the osgi BunndleContext access for cli stuff
fixed IT (configSubsystem related stuff)
enabled documentation generator
upated Future obtained from OFJava to ListenableFuture
changed wiring to OFJava (1switchConnectionProvider = 1 switchConnectionHandler)

Change-Id: I9b7ca8a173e4a36381411cec08772d8440180a03
Signed-off-by: Basheeruddin Ahmed <syedbahm@cisco.com>
Signed-off-by: Michal Rehak <mirehak@cisco.com>