add cancel job

src/main/java/com/cloudam/cromwell/CloudamClient.java

@@ -38,6 +38,7 @@ public class CloudamClient {
         if (response == null || response.code() != 200 || response.body() == null) {
             throw new IllegalArgumentException("the user access token invalid：" + this.accessToken);
         }
+        response.close();
     }
 
     public <T extends CloudamResponse> T doAction(CloudamRequest<T> cloudamRequest) {

src/main/java/com/cloudam/cromwell/core/CancelJobRequest.java

@@ -4,7 +4,7 @@ import com.cloudam.cromwell.CloudamRequest;
 import com.cloudam.cromwell.constant.CloudamURL;
 import okhttp3.Request;
 
-public class CancelJobRequest extends CloudamRequest<GetJobResponse> {
+public class CancelJobRequest extends CloudamRequest<CancelJobResponse> {
 
     private final String urlSuffix = CloudamURL.CANCEL_JOB_URL_SUFFIX;
 
@@ -19,12 +19,12 @@ public class CancelJobRequest extends CloudamRequest<GetJobResponse> {
     }
 
     @Override
-    public Class<GetJobResponse> getResponseClass() {
-        return GetJobResponse.class;
+    public Class<CancelJobResponse> getResponseClass() {
+        return CancelJobResponse.class;
     }
 
     @Override
-    public Request.Builder getBuilder(Request.Builder builder, String url, CloudamRequest<GetJobResponse> cloudamRequest) {
+    public Request.Builder getBuilder(Request.Builder builder, String url, CloudamRequest<CancelJobResponse> cloudamRequest) {
         CancelJobRequest cancelJobRequest = (CancelJobRequest) cloudamRequest;
         return builder
                 .url(url + cancelJobRequest.urlSuffix + "?requestId=" + cancelJobRequest.getJobId())