Allow to not fail a Jenkins X build if the JIRA step fails

Following NXBT-3199, we now have  a platform-staging Jenkins X team.
It uses a dedicated Jenkins image with no configuration for the JIRA plugin to prevent the build from commenting the JIRA issues.
Yet, the builds are failing with:

[JIRA] No JIRA site is configured for this project. This must be a project configuration error

when trying to run:

  post {
    always {
      script {
        if (BRANCH_NAME == 'master') {
          // update JIRA issue
          step([$class: 'JiraIssueUpdater', issueSelector: [$class: 'DefaultIssueSelector'], scm: scm])
        }
      }
    }
  }

We should be able to not fail the whole build in this case.

We've already tried catchError from the Pipeline: Basic Steps plugin but without success (though it works with some simple step like sh 'exit 1').
Using the latest version of the plugin doesn't help, 2.19 at this time.