bug 717705 - fix hang report pagination, use equiv SQL for count and …

…query

socorro/services/hangReport.py

@@ -50,7 +50,7 @@ def get(self, *args):
           FROM hang_report
           WHERE product = %(product)s
           AND version = %(version)s
-          AND report_day > ((%(end)s)::DATE -%(duration)s)
+          AND report_day >= ((%(end)s)::DATE -%(duration)s)
           LIMIT %(listsize)s
           OFFSET %(offset)s"""