Use nginx-extras instead of nginx-full
Use nginx-extras instead of nginx-full

nginx-full does not have the nginx module for secure_link directive.

[#163021331]

Signed-off-by: Peter Goetz <1bf679f6f155949fea19af278a2667a47961da6b@gmail.com>

cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci