XXXX Add ZFS test for illumos 4986

*** 23,32 ****
--- 23,33 ----
          refquota_002_pos \
          refquota_003_pos \
          refquota_004_pos \
          refquota_005_pos \
          refquota_006_neg \
+         refquota_007_pos \
          setup
  
  CMDS = $(PROGS:%=$(TESTDIR)/%)
  $(CMDS) := FILEMODE = 0555