[grid] Exclude status DRAINING when distributor getting available nodes (#14282)

Signed-off-by: Viet Nguyen Duc <[email protected]>

Author: VietND96

java/src/org/openqa/selenium/grid/distributor/local/LocalDistributor.java

@@ -505,7 +505,9 @@ protected Set<NodeStatus> getAvailableNodes() {
     readLock.lock();
     try {
       return model.getSnapshot().stream()
-          .filter(node -> !DOWN.equals(node.getAvailability()))
+          .filter(
+              node ->
+                  !DOWN.equals(node.getAvailability()) && !DRAINING.equals(node.getAvailability()))
           .collect(toImmutableSet());
     } finally {
       readLock.unlock();