fix ent search plugin

Author: kderusso

x-pack/plugin/ent-search/build.gradle

@@ -8,7 +8,7 @@ esplugin {
   name = 'x-pack-ent-search'
   description = 'Elasticsearch Expanded Pack Plugin - Enterprise Search'
   classname = 'org.elasticsearch.xpack.application.EnterpriseSearch'
-  extendedPlugins = ['x-pack-core']
+  extendedPlugins = ['x-pack-core', 'search-business-rules']
 }
 
 base {

x-pack/plugin/ent-search/src/main/java/org/elasticsearch/xpack/application/EnterpriseSearch.java

@@ -24,6 +24,7 @@
 import org.elasticsearch.logging.LogManager;
 import org.elasticsearch.logging.Logger;
 import org.elasticsearch.plugins.ActionPlugin;
+import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.plugins.SearchPlugin;
 import org.elasticsearch.plugins.SystemIndexPlugin;
 import org.elasticsearch.rest.RestController;
@@ -212,7 +213,7 @@
 
 import static java.util.Collections.singletonList;
 
-public class EnterpriseSearch extends SearchBusinessRules implements ActionPlugin, SystemIndexPlugin, SearchPlugin {
+public class EnterpriseSearch extends Plugin implements ActionPlugin, SystemIndexPlugin, SearchPlugin {
 
     public static final String APPLICATION_API_ENDPOINT = "_application";