def ret =sh (script: "ssh -A root@${list[0]}.${SIPDOMAIN} 'ls /tmp/tests-master/${list[0].minus(/2/)}/common -p | grep -v / | tr \'\\n\' ',' '", returnStdout: true)				 
println ret
for (job in entries(ret)) {
    println ${ret[0]}
}
			

Contents of the folder: 
=======================
lab-1:/tmp/tests-master/provisioning/common# ls        
anotherfile   crontab_test                                                        



Results in Jenkins: 
====================
[Pipeline] echo
a,otherfile
cro,tab_test