doc(ci): restriction on branch naming no longer appply

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

CONTRIBUTING.md

@@ -16,8 +16,6 @@ Please refer to the steps described on our website: [How to contribute to OAI](h
       * This decision was made for the license reasons.
       * The Continuous Integration will reject your merge request.
    - All merge requests SHALL have `develop` branch as target branch.
-   - All merge requests SHALL have source branch names that SHALL not contain the `/` character.
-      * We are using a `docker` registry scheme and the image names are based on the source branch name.
 
 ## Coding Styles ##
 

ci-scripts/Jenkinsfile-GitLab-Container

@@ -589,6 +589,7 @@ def triggerCN5GSlaveJob (jobName, gitlabStatusName) {
   if ("MERGE".equals(env.gitlabActionType)) {
     shortenShaOne = sh returnStdout: true, script: 'git log -1 --pretty=format:"%h" --abbrev=8 ' + env.gitlabMergeRequestLastCommit
     shortenShaOne = shortenShaOne.trim()
+    branchName = env.gitlabSourceBranch.replaceAll("/", "-").trim()
     fullRanTag = 'porcepix.sboai.cs.eurecom.fr/oai-gnb:' + env.gitlabSourceBranch + '-' + shortenShaOne
   } else {
     shortenShaOne = sh returnStdout: true, script: 'git log -1 --pretty=format:"%h" --abbrev=8 ' + env.GIT_COMMIT