feat(config-api): health check response rectification and Agama ADS swagger spec (#3293)

* feat(config-api): health check response rectification and Agama ADS swagger spec

* feat(config-api): health check response rectification and Agama ADS swagger spec

* feat(config-api): search changed to 0-index based rather than 1-index based

Author: pujavs

jans-config-api/common/src/main/java/io/jans/configapi/util/ApiConstants.java

@@ -122,7 +122,7 @@ private ApiConstants() {}
 
     //Pagination
     public static final String DEFAULT_LIST_SIZE = "50";
-    public static final String DEFAULT_LIST_START_INDEX = "1";
+    public static final String DEFAULT_LIST_START_INDEX = "0";
     public static final int DEFAULT_MAX_COUNT = 200;  
     public static final String SORT_BY = "sortBy";
     public static final String SORT_ORDER = "sortOrder";