tests: avoid false failure due to remove() ignoring u-w on NFS

* tests/rm/rm1.sh: Also remove the group write bit which
was required on one NFS setup at least.  Note u-w was
enough to deny file creation, g-w was also required to
deny file removal.
* tests/rm/cycle.sh: Likewise.
* tests/mv/perm-1.sh: Likewise.

tests/rm/cycle.sh

@@ -22,7 +22,7 @@ skip_if_root_
 
 mkdir -p a/b
 touch a/b/file
-chmod u-w a/b
+chmod ug-w a/b
 
 
 rm -rf a a 2>&1 | sed 's/:[^:]*$//' > out || fail=1

tests/rm/rm1.sh

@@ -21,7 +21,7 @@ print_ver_ rm
 skip_if_root_
 
 mkdir -p b/a/p b/c b/d || framework_failure_
-chmod u-w b/a || framework_failure_
+chmod ug-w b/a || framework_failure_
 
 
 # This should fail.