Fixed an incorrect cast

Casting getQuery to String was causing an exception. We cannot cast a LinkedHashMap to a String.

pic-sure-resources/pic-sure-aggregate-data-sharing-resource/src/main/java/edu/harvard/hms/dbmi/avillach/AggregateDataSharingResourceRS.java

@@ -336,7 +336,7 @@ private String getCrossCountForQuery(QueryRequest queryRequest) throws IOExcepti
 	}
 
 	private QueryRequest changeQueryExpectedResultType(QueryRequest queryRequest) {
-		String query = (String) queryRequest.getQuery();
+		Object query = queryRequest.getQuery();
 		logger.debug("Changing query: " + query);
 		JsonNode jsonNode = json.valueToTree(query);
 		List<JsonNode> expectedResultTypeParents = jsonNode.findParents("expectedResultType");