Fix congress-server launching failed
Fix congress-server launching failed

Launching failed because of typo issue, 'webserivce'
should be 'webservice' in api/router.py.

Change-Id: Icca88e8d93723829c135f505abe8e88c710bc833
Closes-Bug: #1459141

openstack/congress,ekcs/congress,openstack/congress,ramineni/my_congress,ramineni/my_congress,ekcs/congress,ramineni/my_congress,ramineni/my_congress,ekcs/congress,ekcs/congress