Merge branch 'fix/shepherd-http500-handle' into 'master'

Fix: handle http500 response from shepherd

See merge request sheepitrenderfarm/client!147

src/main/java/com/sheepit/client/Client.java

@@ -1090,7 +1090,12 @@ import okhttp3.HttpUrl;
 					// the client cannot recover from this error (it's server side config) so exit the retry loop
 					confirmJobReturnCode = Type.IMAGE_TOO_LARGE;
 					break retryLoop;
-					
+				
+				case ERROR_BAD_RESPONSE:
+					// set the error and retry on next loop
+					confirmJobReturnCode = Type.ERROR_BAD_UPLOAD_RESPONSE;
+					break;
+				
 				default:
 					// do nothing, try to do a request on the next loop
 					break;

src/main/java/com/sheepit/client/Server.java

@@ -641,6 +641,9 @@ public class Server extends Thread {
 				this.log.error(response.body().string());
 				return ServerCode.JOB_VALIDATION_IMAGE_TOO_LARGE;
 			}
+			else if (r == HttpURLConnection.HTTP_INTERNAL_ERROR) {
+				return ServerCode.ERROR_BAD_RESPONSE;
+			}
 			else {
 				this.log.error(String.format("Server::HTTPSendFile Unknown response received from server: %s", response.body().string()));
 			}