make ER only go back 10 days

Our Elastic Search index is down to 10 days, but ER looks at 14,
which makes people think bugs are showing up for the first time
10 days ago. Match the duration for ES.

Change-Id: I4e47ece38e68d4ee19ee61b9a107bba9f12abf8c

elastic_recheck/cmd/graph.py

@@ -62,7 +62,13 @@ def main():
     ts = datetime(ts.year, ts.month, ts.day, ts.hour)
     # ms since epoch
     now = int(((ts - epoch).total_seconds()) * 1000)
-    start = now - (14 * 24 * STEP)
+    # number of days to match to, this should be the same as we are
+    # indexing in logstash
+    days = 10
+    # How far back to start in the graphs
+    start = now - (days * 24 * STEP)
+    # ER timeframe for search
+    timeframe = days * 24 * STEP / 1000
 
     for query in classifier.queries:
         if args.queue:
@@ -73,7 +79,7 @@ def main():
         urlq = dict(search=query['query'],
                     fields=[],
                     offset=0,
-                    timeframe="604800",
+                    timeframe=str(timeframe),
                     graphmode="count")
         logstash_query = base64.urlsafe_b64encode(json.dumps(urlq))
         bug_data = get_launchpad_bug(query['bug'])