Add vTerminal support.

vTerminal is isolated input and output terminal used by flow filter.

Other changes:

  * Rename Java APIs for vBridge interface.
    * IVTNManager
      * getBridgeInterfaces(VBridgePath)
        => getInterfaces(VBridgePath)
      * getBridgeInterface(VBridgeIfPath)
        => getInterface(VBridgeIfPath)
      * addBridgeInterface(VBridgeIfPath, VInterfaceConfig)
        => addInterface(VBridgeIfPath, VInterfaceConfig)
      * modifyBridgeInterface(VBridgeIfPath, VInterfaceConfig, boolean)
        => modifyInterface(VBridgeIfPath, VInterfaceConfig, boolean)
      * removeBridgeInterface(VBridgeIfPath)
        => removeInterface(VBridgeIfPath)
    * IVTNManagerAware
      * vBridgeInterfaceChanged(VBridgeIfPath, VInterface, UpdateType)
        => vInterfaceChanged(VBridgeIfPath, VInterface, UpdateType)
  * Install a flow entry that drops every incoming packet when a packet
    is received from disabled virtual interface. It will be uninstalled
    when the virtual interface is enabled.

Change-Id: I12ef8c65fff3ac9463de51da5d2db70b3500e74e
Signed-off-by: Shigeru Yasuda <s-yasuda@da.jp.nec.com>
Merge "Add vTerminal support."