correct unit test assert ordering

Author: ddsharpe

imagetool/src/test/java/com/oracle/weblogic/imagetool/aru/VersionTest.java

@@ -68,7 +68,7 @@ void equalObjects() {
         assertEquals(a, b);
         assertEquals(b, a);
         assertEquals(a, a);
-        assertNotEquals(a, null);
+        assertNotEquals(null, a);
     }
 
     @Test