[fixes #2985] Resolve var/val only once in eclipse

test/transform/resource/messages-idempotent/ValInvalidParameter.java.messages

@@ -0,0 +1,9 @@
+3 cannot find symbol
+4 cannot find symbol
+5 cannot find symbol
+6 cannot find symbol
+7 cannot find symbol
+8 cannot find symbol
+9 method b2 in class ValInvalidParameter cannot be applied to given types;
+10 reference to a is ambiguous
+11 reference to a is ambiguous