Update agent label

jenkinsfile/Jenkinsfile

 pipeline {
-    agent { label 'docker-agent' } 
+    agent { label 'docker-paas-agent' }
     
     environment {
         ORCHENT_AGENT_ACCOUNT='infn-cloud-ops'
@@ -10,6 +10,7 @@ pipeline {
         stage ('Test environment'){
             steps {
                 withCredentials([
+                    sshUserPrivateKey(credentialsId: "ssh_scans", keyFileVariable: 'keyfile'),
                     usernamePassword(credentialsId: "jenkins_scans_creds", usernameVariable: 'GMP_USER', passwordVariable: 'GMP_PASSWORD')
                 ]) {
                     sh '''#!/bin/bash
@@ -31,10 +32,10 @@ pipeline {
                         fi
 
                         # Create ssh tunnel
+                        cp ${keyfile} /home/jenkins/.ssh/id_rsa
                         ssh -o StrictHostKeyChecking=no -f -N -L localhost:9390:192.168.235.234:9390 jenkins@scans.cloud.infn.it 
 
                         # Greenbone connection test
-                        #/var/lib/jenkins/.local/bin/gvm-cli --gmp-username $GMP_USER --gmp-password $GMP_PASSWORD tls --hostname 127.0.0.1 --xml "<get_version/>" > gvm.output
                         /usr/local/bin/gvm-cli --gmp-username $GMP_USER --gmp-password $GMP_PASSWORD tls --hostname 127.0.0.1 --xml "<get_version/>" > gvm.output
                         if grep -q OK gvm.output
                         then