[#150906634] Add haproxy_ssl_ca to varibles in keep-haproxy-ssl-pem.yml unit test
[#150906634] Add haproxy_ssl_ca to varibles in keep-haproxy-ssl-pem.yml unit test

Signed-off-by: Steve Taylor <2618d8eeb38db5666975df4fd945cc4512e3f384@pivotal.io>

cloudfoundry/cf-deployment,cloudfoundry/cf-deployment,emalm/cf-deployment