expect, that hub is returning GM time

Fixes: https://pagure.io/koji/issue/1915

www/kojiweb/taskinfo.chtml

@@ -2,7 +2,7 @@
 #from kojiweb import util
 #from six.moves.urllib.parse import quote
 #import cgi
-#import time
+#import datetime
 
 #def printValue($key, $value, $sep=', ')
   #if $key in ('brootid', 'buildroot_id')
@@ -343,7 +343,7 @@ $value
     #set $end_ts = $task.completion_ts
     #end if
     #if not $end_ts
-    #set $end_ts = time.time()
+    #set $end_ts = datetime.datetime.utcnow().timestamp()
     #end if
     <tr>
       <th title="From task's creation">Total time</th>