xpmem: fix mapping of attachment and segment

* Mapping attached part of segment is done at attach time instead of
  make time to work with runtimes (e.g. OpenMPI) xpmem_make-ing the
  entire user-space
* Mapping attached part of segment at attach time can be turned off by
  specifying xpmem_remote_on_demand in kernel argument
* Mapping attachment chooses appropriate page-sizes, i.e., largest
  allowed by memory range and segment page boundary

Fixes: a8696d8 "xpmem: Support large page attachment"
Change-Id: I44663865204036520e5f62fe22b9134ee4629f9b

test/common.sh

@@ -107,7 +107,7 @@ fi
 
 mcstop() {
 	echo -n "mcstop+release.sh ... "
-	sudo "$SBIN/mcstop+release.sh"
+	"$SBIN/mcstop+release.sh"
 	echo "done"
 
 	if lsmod | grep mcctrl > /dev/null 2>&1; then
@@ -118,7 +118,7 @@ mcstop() {
 
 mcreboot() {
 	echo -n "mcreboot.sh $BOOTPARAM ... "
-	sudo "$SBIN/mcreboot.sh" $BOOTPARAM
+	"$SBIN/mcreboot.sh" $BOOTPARAM
 	echo "done"
 
 	if ! lsmod | grep mcctrl > /dev/null 2>&1; then