Bug 2030 : Adding jetty corsfilter in restconf and docgen bundles to avoid cross origin error

Change-Id: I47b860b5c092d54e0ae106b2b832c021502ad52f
Signed-off-by: Harman Singh <harmasin@cisco.com>
Merge "Bug 2030 : Adding jetty corsfilter in restconf and docgen bundles to avoid cross origin error"