Fixed the deployment CQ

Apparently running a query with "RESAMPLE EVERY 30m FOR 1h" _without_
an aggregate function results in InfluxDB throwing an error. This in
turn leads to it retrying the same CQ every second, because if it
doesn't work the first time it will _probably_ work the 12039812093th
time.

queries/other/deployments.txt

 CREATE CONTINUOUS QUERY deployments on $DATABASE
-RESAMPLE EVERY 30m FOR 1h
 BEGIN
-    SELECT *
+    SELECT distinct(version)
     INTO forever.deployments
     FROM "default".deployments
+    GROUP BY time(30m)
 END