I've updated my Jenkins installation to 2.150 and also plugins. I've set Gitlab token in Jenkins configuration and connection works without problem when I click on "Test connection" button.

When I launch a pipeline Job, repository is correctly pulled but I've the following warning in console output:

Warning: CredentialId "RENO-Gitlab" could not be found.

Here is my pipeline code:

 checkout([
   $class: 'GitSCM',
    branches: [[name: "origin/dev"]],
    userRemoteConfigs: [[credentialsId: 'RENO-Gitlab', url: 'git@mygitlab.group/project.git']]
])

So the Job starts well and works but this warning is displayed.