Enable docker pipeline

jenkinsfile/Jenkinsfile

 pipeline {
     agent { 
-        label 'docker-paas-agent' 
-        docker { image 'harbor.cloud.infn.it/cicd/jenkins-paas-slave:latest' }
+        docker { image 'harbor.cloud.infn.it/cicd/jenkins-paas-slave:latest'
+                 reuseNode true
+        }
     } 
     
     environment {
@@ -38,6 +39,7 @@ pipeline {
 
                         # 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 
                             echo "gvm check: OK"