Don't build REST API document if "vtn.doc.skip" property is defined.
Don't build REST API document if "vtn.doc.skip" property is defined.

Change-Id: I59681dfa61248580fd4e06289d5b76dff4335d4d
Signed-off-by: Shigeru Yasuda <4286dc62f6b184926d282535950a80f031d65860@da.jp.nec.com>

opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn