95iscsi: strip one set of quotes when calling initqueue

The bad initqueue parameter passing is already addressed by git commit:
commit bb8c16d121
and
commit 486a8f33e2

However this appraoch is slightly different:
"$netroot" instead of "'$netroot'", etc.

initqueue will process the arguments, assuming the first non-option
argument to be the program to be executed. Putting the entire
commandline into this argument confuses both, initqueue and the
program in question.

References: bnc#879038

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>

modules.d/95iscsi/parse-iscsiroot.sh

@@ -59,10 +59,10 @@ fi
 
 # iscsi_firmware does not need argument checking
 if [ -n "$iscsi_firmware" ] ; then
-    netroot=${netroot:-iscsi:}
+    [ -z "$netroot" ] && netroot=iscsi:
     modprobe -q iscsi_boot_sysfs 2>/dev/null
     modprobe -q iscsi_ibft
-    initqueue --onetime --timeout /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
+    initqueue --onetime --timeout /sbin/iscsiroot dummy "$netroot" "$NEWROOT"
 fi
 
 # If it's not iscsi we don't continue
@@ -86,7 +86,7 @@ fi
 
 if [ -n "$netroot" ] && [ "$root" != "/dev/root" ] && [ "$root" != "dhcp" ]; then
     if ! getargbool 1 rd.neednet >/dev/null || ! getarg "ip="; then
-        initqueue --onetime --settled /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
+        initqueue --onetime --settled /sbin/iscsiroot dummy "$netroot" "$NEWROOT"
     fi
 fi