Adding in the new syntax to trigger Event Listener

[prattyushmangal]

Description of Change

Latest Version of OCP Pipelines require the Event Listener call to be a POST with a Body and so the curl call in the test-ddd script needed updating in line with syntax referenced at https://github.com/IBM/cp4i-deployment-samples/blob/2021.3.1/DrivewayDentDeletion/Operators/cicd-apply-dev-pipeline.sh#L228

Verification of Change

• Has been verified by Fermi Squad internally but the implementation of that change was missed in this script. So just adding it there.

[prattyushmangal]

Tested that implementation without escapes:

> oc get route el-main-trigger-route --template='http://{{.spec.host}}' 
http://el-main-trigger-route-cp4i.<endpoint>-0000.us-south.containers.appdomain.cloud%   

> prattyushmangal@Prattyushs-MBP Operators %   curl -X POST http://el-main-trigger-route-cp4i.<endpoint>-0000.us-south.containers.appdomain.cloud --header "Content-Type: application/json" --data '{"message":"Test run"}' 

{"eventListener":"test-apic-event-listener","namespace":"cp4i","eventID":"3b6debd5-0773-4e46-a1b7-f54dbc19bee3"}

And with that I can see the Pipeline Get triggered