EPEL 5: Add 1 second pause after unmounting any filesystem.

This fixes the test-charset-fidelity test case.  A simpler example
which fails without this is:

  guestfish <<EOF
  sparse test1.img 1G
  run
  part-disk /dev/sda mbr
  mkfs msdos /dev/sda1
  mount /dev/sda1 /
  touch /foo
  umount /
  mkfs ntfs /dev/sda1
  # Next command would fail:
  mount /dev/sda1 /
  vfs-type /dev/sda1 -x
  EOF

daemon/mount.c

@@ -228,6 +228,9 @@ do_umount (const char *pathordevice,
     return -1;
   }
 
+  /* RHEL 5 only. */
+  sleep (1);
+
   return 0;
 }
 
@@ -393,6 +396,9 @@ do_umount_all (void)
 
   free_stringslen (mounts.argv, mounts.size);
 
+  /* RHEL 5 only. */
+  sleep (1);
+
   return 0;
 }