Merge relevant CXFSQA tests into XFSQA

Merge of master-melb:xfs-cmds:26631a by kenmcd.

common.rc

@@ -623,6 +623,15 @@ _require_nonexternal()
 	_notrun "External device testing in progress, skipped this test"
 }
 
+# check for the fsgqa user on the machine
+#
+_require_user()
+{
+    qa_user=fsgqa
+    cat /etc/passwd | grep -q $qa_user
+    [ "$?" == "0" ] || _notrun "$qa_user user not defined."
+}
+
 # check that a FS is mounted as XFS. if so, return mount point
 #
 _xfs_mounted()