Use exported merged config of config and default config across webController
Corresponding changes in core is: https://review.opencontrail.org/#/c/4274/

Change-Id: I9cccf8ad197e8168870efe6444eaac6ba0633ddd
Merge "Use exported merged config of config and default config across webController Corresponding changes in core is: https://review.opencontrail.org/#/c/4274/"