CI: lock mechanism improvement

 -- in slave job, the lock is now properly done for the whole job
 -- in master job, all slave jobs are really sent in parallel
    they should now now appear as failed (if fails)
 cherry-picked from develop (47437903)
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/Jenkinsfile-tmp-ran

@@ -61,6 +61,7 @@ pipeline {
     options {
         disableConcurrentBuilds()
         ansiColor('xterm')
+        lock (ciSmartPhoneResource)
     }
     // the following parameter options are commented out so it shows the ones
     // that you SHALL have to run the job.
@@ -184,7 +185,6 @@ pipeline {
             steps {
                 script {
                     dir ('ci-scripts') {
-                      lock (ciSmartPhoneResource) {
                         try {
                             echo "\u2705 \u001B[32m${testStageName}\u001B[0m"
                             withCredentials([
@@ -197,7 +197,6 @@ pipeline {
                         } catch (Exception e) {
                             currentBuild.result = 'FAILURE'
                         }
-                      }
                     }
                 }
             }