fix gate submodule uri
fix gate submodule uri

Signed-off-by: Michael Fraenkel <ba3744c471de6199d0515ce197b77e0dafd711ed@us.ibm.com>

Amit-PivotalLabs/concourse,squeedee/concourse,jbayer/concourse,concourse/concourse,cjcjameson/concourse,longnguyen11288/concourse,sedouard/concourse,CloudCredo/concourse,zachgersh/concourse,zachgersh/concourse,cjcjameson/concourse,beni55/concourse,Amit-PivotalLabs/concourse,squeedee/concourse,beni55/concourse,longnguyen11288/concourse,holgero/concourse,jbayer/concourse,concourse/concourse,concourse/concourse,concourse/concourse,sedouard/concourse,squeedee/concourse,holgero/concourse,CloudCredo/concourse,holgero/concourse,zachgersh/concourse,beni55/concourse,jbayer/concourse,concourse/concourse,longnguyen11288/concourse,Amit-PivotalLabs/concourse,cjcjameson/concourse,sedouard/concourse,CloudCredo/concourse