1) Fix compatibility problems with the Port field in unix nodes of the cluster

2) better cleanup of remnants of remote parallel runs when Strategy ==1
3) for  windows sessions eliminate the use of start, replaced by psexec -d  instanced, to allow cleanup of .bat file
4) fix bug in Strategy==1 that was not properly cleaned by deleting new files on exit
(cherry picked from commit 6ec501bccbae35de92e6566cbb3341468677016b)