test-command-template.t: fix test so it all year

This test started failing for me after midnight UTC on December
31st. Fixed it by specifying a date 7 years in the future more
precisely (rather than just adding 8 to the year and specifying
January 1st), which allows the test to pass both now and on 2012-12-01
at the same time.

tests/test-command-template.t

@@ -1348,7 +1348,8 b' Age filter:'
 
   >>> from datetime import datetime
   >>> fp = open('a', 'w')
-  >>> fp.write(str(datetime.now().year + 8) + '-01-01 00:00')
+  >>> n = datetime.now()
+  >>> fp.write('%d-%d-%d 00:00' % ((n.year + 7), n.month, n.day))
   >>> fp.close()
   $ hg add a
   $ hg commit -m future -d "`cat a`"