Update token api success response status code

Reviewed-on: community/device-mgt-core#11

README.md

@@ -2,4 +2,4 @@
 
 <a href='https://opensource.org/licenses/Apache-2.0'><img src='https://img.shields.io/badge/License-Apache%202.0-blue.svg'></a><br/>
 
-[![pipeline status](https://gitlab.com/entgra/carbon-device-mgt/badges/master/pipeline.svg)](https://gitlab.com/entgra/carbon-device-mgt/commits/master)
+<a href='#'><img src="https://storage.googleapis.com/cdn-entgra/build-status/device-mgt-core/icon.svg"></a>

components/apimgt-extensions/org.wso2.carbon.apimgt.keymgt.extension.api/src/main/java/org/wso2/carbon/apimgt/keymgt/extension/api/KeyManagerServiceImpl.java

@@ -19,8 +19,6 @@
 package org.wso2.carbon.apimgt.keymgt.extension.api;
 
 import com.google.gson.Gson;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.apimgt.keymgt.extension.DCRResponse;
 import org.wso2.carbon.apimgt.keymgt.extension.TokenRequest;
 import org.wso2.carbon.apimgt.keymgt.extension.TokenResponse;
@@ -83,7 +81,7 @@ public class KeyManagerServiceImpl implements KeyManagerService {
                     new TokenRequest(encodedClientCredentials.split(":")[0],
                             encodedClientCredentials.split(":")[1], refreshToken, scope,
                             grantType, assertion,admin_access_token));
-            return Response.status(Response.Status.CREATED).entity(gson.toJson(resp)).build();
+            return Response.status(Response.Status.OK).entity(gson.toJson(resp)).build();
         } catch (KeyMgtException e) {
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
         } catch (BadRequestException e) {