enable passing tests

...uffle.r.test/src/com/oracle/truffle/r/test/S4/TestS4.java

...rc/com/oracle/truffle/r/test/builtins/TestBuiltin_La.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_asS4.java

...m/oracle/truffle/r/test/builtins/TestBuiltin_doTrace.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_drop.java

...om/oracle/truffle/r/test/builtins/TestBuiltin_factor.java

...oracle/truffle/r/test/builtins/TestBuiltin_identical.java

...racle/truffle/r/test/builtins/TestBuiltin_isfunction.java

...om/oracle/truffle/r/test/builtins/TestBuiltin_islist.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_max.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_min.java

...oracle/truffle/r/test/builtins/TestBuiltin_operators.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_sep.java

...acle/truffle/r/test/builtins/TestBuiltin_setS4Object.java

...oracle/truffle/r/test/library/base/TestSimpleVectors.java