Store ca_cert.pem in docs director manifest
Store ca_cert.pem in docs director manifest

This simplifies the BOSH deployment docs and uses a bosh-cli V2
feature.

We retain ca_cert.pem in the root of the docs directory to be
accessible to the cloudfoundry docs.

cloudfoundry-incubator/bosh-google-cpi-release,cloudfoundry-incubator/bosh-google-cpi-release,evandbrown/bosh-google-cpi-release,cloudfoundry-incubator/bosh-google-cpi-release,evandbrown/bosh-google-cpi-release,evandbrown/bosh-google-cpi-release,evandbrown/bosh-google-cpi-release,cloudfoundry-incubator/bosh-google-cpi-release