Fixed a bug where valves couldn't be interrupted while producing a co…

…cktail

backend/src/main/java/net/alex9849/cocktailpi/service/pumps/cocktailfactory/productionstepworker/AbstractPumpingProductionStepWorker.java

@@ -149,6 +149,9 @@ public synchronized void start() {
                             driver.setOpen(true);
                             while (currentGrams < initialReadGrams + goalGrams) {
                                 currentGrams = hx711.read_once();
+                                if(Thread.interrupted()) {
+                                    throw new InterruptedException();
+                                }
                             }
                             valveEndTime = System.currentTimeMillis();
                             driver.setOpen(false);