SDC-1423 use aggregation strategy

See documentation: https://support.astron.nl/confluence/display/SDCP/strategy%3A+collect_h5

atdb/atdb/static/taskdatabase/style.css

@@ -8,7 +8,7 @@ TD {
   color: green;
 }
 
-.defined,.staged,.fetched,.processed,.stored,.validated,.scrubbed,.archived,.finished,.aggregated {
+.defined,.staged,.fetched,.processed,.stored,.validated,.scrubbed,.archived,.finished,.aggregate,.aggregated {
   background-color: lemonchiffon;
   color: blue;
 }
@@ -27,11 +27,6 @@ TD {
    background-color: lightgreen;
 }
 
-.aggregate {
-  font-weight: bold;
-  background-color: lightgreen;
-}
-
 .aggregate_failed,.aggregating_failed {
   color: red;
   font-weight: bold;