revert (()) to {{}} in ops files
revert (()) to {{}} in ops files

We are doing this because we learned that (()) with a `null` value in a task param gets evaluated as a "null" string. Where {{}} evaluated it as a "".
Hope to fix this in the future!

Signed-off-by: Kira Boyle <915c52ff6d15959b77bad7a6f38cf248769bd1c2@pivotal.io>

sandyg1/pcf-pipelines,rahulkj/pcf-pipelines,sandyg1/pcf-pipelines,rahulkj/pcf-pipelines,sandyg1/pcf-pipelines,pivotal-cf/pcf-pipelines,sandyg1/pcf-pipelines,pivotal-cf/pcf-pipelines,rahulkj/pcf-pipelines,rahulkj/pcf-pipelines,pivotal-cf/pcf-pipelines,pivotal-cf/pcf-pipelines