[TRAVIS] Remove DNS portion of testing GCE tf file
[TRAVIS] Remove DNS portion of testing GCE tf file

Because our automated testing systems don't verify DNS setups, we need
to remove the DNS module from the testing copy of the GCE terraform
config file.

CiscoCloud/mantl,CiscoCloud/microservices-infrastructure,mantl/mantl,CiscoCloud/microservices-infrastructure,KaGeN101/mantl,mantl/mantl,CiscoCloud/mantl,KaGeN101/mantl