Fix issues in swagger definition

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementAPI.java

@@ -260,10 +260,9 @@ public interface ApplicationManagementAPI {
                             message = "OK. \n Successfully created an application.",
                             response = Application.class),
                     @ApiResponse(
-                            code = 304,
-                            message = "Not Modified. \n " +
-                                    "Empty body because the client already has the latest version of the requested "
-                                    + "resource."),
+                            code = 400,
+                            message = "Bad Request. \n " +
+                                    "Application creating payload contains unacceptable or vulnerable data"),
                     @ApiResponse(
                             code = 500,
                             message = "Internal Server Error. \n Error occurred while getting the application list.",

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java

@@ -98,8 +98,6 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
             }
 
             return Response.status(Response.Status.OK).entity(application).build();
-        } catch (NotFoundException e) {
-            return Response.status(Response.Status.NOT_FOUND).build();
         } catch (ApplicationManagementException e) {
             log.error("Error occurred while getting application with the uuid " + appType, e);
             return APIUtil.getResponse(e, Response.Status.INTERNAL_SERVER_ERROR);