Opa e2e tests with cluster update

[wisinghe]

Run opa tests after all the other e2e tests in an updated cluster

[zalando-robot]

Cannot start a pipeline due to:

Pipeline creation failed with: while scanning a double-quoted scalar
  in "<unicode string>", line 348, column 24:
                    value: "(\[Opa\])"
                           ^
found unknown escape character '['
  in "<unicode string>", line 348, column 27:
                    value: "(\[Opa\])"
                              ^

Click on pipeline status check Details link below for more information.