SLIDER-875 add helper method for getMetaInfo(null)
diff --git a/slider-core/src/main/java/org/apache/slider/providers/agent/AgentProviderService.java b/slider-core/src/main/java/org/apache/slider/providers/agent/AgentProviderService.java
index 7594d51..2ab5c6f 100644
--- a/slider-core/src/main/java/org/apache/slider/providers/agent/AgentProviderService.java
+++ b/slider-core/src/main/java/org/apache/slider/providers/agent/AgentProviderService.java
@@ -1435,8 +1435,7 @@
 
     // identify client component
     Component client = null;
-    for (Component component : getMetaInfo(null).getApplication()
-        .getComponents()) {
+    for (Component component : getMetaInfo().getApplication().getComponents()) {
       if (component.getCategory().equals("CLIENT")) {
         client = component;
         break;
@@ -1466,8 +1465,7 @@
       throw new IOException(e);
     }
 
-    for (ConfigFile configFile : getMetaInfo(null)
-        .getComponentConfigFiles(client.getName())) {
+    for (ConfigFile configFile : getMetaInfo().getComponentConfigFiles(client.getName())) {
       addNamedConfiguration(configFile.getDictionaryName(),
           appConf.getGlobalOptions().options, configurations, tokens, null,
           client.getName(), client.getName());
@@ -1481,8 +1479,7 @@
     //do a final replacement of re-used configs
     dereferenceAllConfigs(configurations);
 
-    for (ConfigFile configFile : getMetaInfo(null)
-        .getComponentConfigFiles(client.getName())) {
+    for (ConfigFile configFile : getMetaInfo().getComponentConfigFiles(client.getName())) {
       ConfigFormat configFormat = ConfigFormat.resolve(configFile.getType());
 
       Map<String, String> config = configurations.get(configFile.getDictionaryName());
@@ -1598,6 +1595,10 @@
     return workFolderExports;
   }
 
+  protected Metainfo getMetaInfo() {
+    return getMetaInfo(null);
+  }
+
   @VisibleForTesting
   protected Metainfo getMetaInfo(String roleGroup) {
     String mapKey = DEFAULT_METAINFO_MAP_KEY;