Added greenbone check

jenkinsfile/Jenkinsfile

@@ -32,7 +32,7 @@ pipeline {
                         which gvm-cli
 
                         # Greenbone connection test
-                        /var/lib/jenkins/.local/bin/gvm-cli --gmp-username $GMP_USERNAME --gmp-password $GMP_PASSWD tls --hostname $HOST_IP --xml "<get_version/>"
+                        /var/lib/jenkins/.local/bin/gvm-cli --gmp-username $GMP_USER --gmp-password $GMP_PASSWORD tls --hostname $HOST_IP --xml "<get_version/>"
 
                     '''
                 }