Add module info back in

Author: kderusso

x-pack/plugin/search-business-rules/src/main/java/module-info.java

@@ -16,4 +16,7 @@
     requires org.elasticsearch.xcore;
 
     exports org.elasticsearch.xpack.searchbusinessrules;
+
+    provides org.elasticsearch.features.FeatureSpecification with org.elasticsearch.xpack.searchbusinessrules.SearchBusinessRulesFeatures;
+    provides org.elasticsearch.plugins.SearchPlugin with org.elasticsearch.xpack.searchbusinessrules.SearchBusinessRules;
 }