disable the 'sshd enablement' for diskless and statelite (#3027)

* fix issue2726 remoteshell failed in line 488 in statelite

* polished based on comments

* polished based on comments

* fix sles12 failure

xCAT/postscripts/remoteshell

@@ -466,7 +466,6 @@ fi
 
 # start up the sshd for syncfiles postscript to do the sync work
 logger -t xcat -p local4.info "start up sshd"
-
 if [[ $OSVER == ubuntu* || $OSVER == debian* ]]
 then
     if [ ! -d /var/run/sshd ];then
@@ -486,7 +485,7 @@ else
     # sshd is not enabled on SLES 12 by default
     # does not hurt anything to re-enable if it is enabled already
     # and disable enable service for diskless and statelite
-    if [ "$NODESETSTATE" = install ]; then
+    if [[ "$NODESETSTATE" != netboot && "$NODESETSTATE" != statelite ]]; then
         enableservice sshd
     fi
     restartservice sshd
@@ -498,5 +497,4 @@ if [ "$?" != "0" ];then
    [ -n "$PIDLIST" ] && kill 9 $PIDLIST
    /usr/sbin/sshd  
 fi
-
 kill -9 $CREDPID