Add config api call

Author: adimiz1

cloudinary-core/src/main/java/com/cloudinary/Api.java

@@ -72,6 +72,16 @@ public ApiResponse usage(Map options) throws Exception {
         return callApi(HttpMethod.GET, uri, ObjectUtils.emptyMap(), options);
     }
 
+    public ApiResponse configuration(Map options) throws  Exception {
+        if(options == null) options = ObjectUtils.emptyMap();
+
+        final List<String> uri = new ArrayList<String>();
+        uri.add("config");
+
+        Map params = ObjectUtils.only(options, "settings");
+
+        return callApi(HttpMethod.GET, uri, params, options);
+    }
 
     public ApiResponse resourceTypes(Map options) throws Exception {
         if (options == null) options = ObjectUtils.emptyMap();

cloudinary-test-common/src/main/java/com/cloudinary/test/AbstractApiTest.java

@@ -668,6 +668,13 @@ public void testRateLimits() throws Exception {
         Assert.assertNotEquals(0, result.apiRateLimit().getRemaining());
     }
 
+    @Test
+    public void testConfiguration() throws Exception {
+        ApiResponse result = cloudinary.api().configuration(new ObjectUtils().asMap("settings", true));
+        Map settings = (Map) result.get("settings");
+        Assert.assertNotNull(settings.get("folder_mode"));
+    }
+
     @Test
     public void test19Ping() throws Exception {
         // should support ping API call