Merge pull request #4808 from jakesmith/hpcc-9349b

HPCC-9349 - HTTPCALL still failing due to missing line in commit

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>

thorlcr/master/thactivitymaster.cpp

@@ -150,6 +150,7 @@ public:
             case TAKsoap_rowaction:
             case TAKsoap_datasetdataset:
             case TAKsoap_datasetaction:
+            case TAKhttp_rowdataset:
                 ret = new CMasterActivity(this);
                 break;
             case TAKskipcatch: