Fix bwc again

Author: nicktindall

server/src/main/java/org/elasticsearch/rest/action/cat/RestThreadPoolAction.java

@@ -227,7 +227,7 @@ private Table buildTable(RestRequest req, ClusterStateResponse state, NodesInfoR
 
                 table.addCell(entry.getKey());
                 table.addCell(
-                    poolInfo == null ? null : ThreadPool.ThreadPoolType.bwcType(poolInfo.getName(), poolInfo.getThreadPoolType())
+                    poolInfo == null ? null : ThreadPool.ThreadPoolType.bwcType(poolInfo.getName(), poolInfo.getThreadPoolType()).getType()
                 );
                 table.addCell(poolStats == null ? null : poolStats.active());
                 table.addCell(poolStats == null ? null : poolStats.threads());