docker/nwl-cicd.yaml: disable SCM poll for seed job

when seeding a branch other than the default one the poll
detects a SCM change and triggers right after a new seed job
which might revert the jobs seeded by the previous job run.
With this behavior it won't be possible to seed a specific
and run the intentionaly seeded jobs.
Thus, this commit disables SCM poll.

Signed-off-by: Marc Mattmüller <marc.mattmueller@netmodule.com>

docker/nwl-cicd.yaml

@@ -84,6 +84,7 @@ jobs:
               credentials('gitCredentials')
             }
             extensions {
+              disableRemotePoll()
               wipeWorkspace()
             }
           }