Fix silly monitoring test checking exact output
Original commit: elastic/x-pack-elasticsearch@af9302f1227a289ae8b582ccdbc0f7129a1823dd
@@ -514,6 +514,8 @@ public class ClusterStatsMonitoringDocTests extends BaseMonitoringDocTestCase<Cl
+ "{"
+ "\"name\":\"_plugin\","
+ "\"version\":\"_plugin_version\","
+ + "\"elasticsearch_version\":\"" + Version.CURRENT + "\","
+ + "\"java_version\":\"1.8\","
+ "\"description\":\"_plugin_desc\","
+ "\"classname\":\"_plugin_class\","
+ "\"extended_plugins\":[],"
