[grid] Allowing binary to be set via options when not set in Grid.

Fixes #11914

Author: diemol

java/src/org/openqa/selenium/grid/node/config/SessionCapabilitiesMutator.java

@@ -152,7 +152,11 @@ private Map<String, Object> mergeChromiumOptions(Map<String, Object> stereotypeO
         toReturn.put("extensions", stereotypeExtensions);
       }
 
-      if (!name.equals("binary") && !name.equals("extensions") && !name.equals("args")) {
+      if (name.equals("binary") && !stereotypeOptions.containsKey("binary")) {
+        toReturn.put(name, value);
+      }
+
+      if (!name.equals("extensions") && !name.equals("args")) {
         toReturn.put(name, value);
       }
     }