fix JobStatsMonitoringDocTests

Author: Hendrik Muhs

x-pack/plugin/monitoring/src/test/java/org/elasticsearch/xpack/monitoring/collector/ml/JobStatsMonitoringDocTests.java

@@ -155,6 +155,9 @@ public void testToXContent() throws IOException {
                          + "\"log_time\":1483315322002,"
                          + "\"timestamp\":1483228861001"
                         + "},"
+                        + "\"forecasts_stats\":{"
+                         + "\"total\":0,\"forecasted_jobs\":0"
+                        + "},"
                        + "\"state\":\"opened\","
                        + "\"node\":{"
                          + "\"id\":\"_node_id\","