zdtm: fix adding test cases to the list

bash returned the error : No such file or directory
and doesn't add three test cases to the list.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -47,7 +47,7 @@ static/inotify00
 TEST_LIST=$TEST_LIST$(echo $TEST_LIST | tr ' ' '\n' | sed 's#^#pidns/#')
 
 # These ones are not in pidns
-TEST_LIST=$TEST_LIST "
+TEST_LIST="$TEST_LIST
 static/zombie00
 transition/fork
 static/file_fown