NameTable.checkScopingRules() checks scoping rules in translated package names
instead of the original package names. This leads to a bogus reject of valid IDL
code, when the option "-i2jpackage" is used.

Example:
$ cat foo.idl
module foo {
	interface bar {
	};
};

$ idl -i2jpackage foo:foo.foo foo.idl
[jacorb.idl] ERROR : foo.idl, line:1(11): Module name foo.foo already defined
	module foo
[jacorb.idl] ERROR : /tmp/foo.idl, line: 5(1): 1 error(s).
	
[jacorb.idl] ERROR : /tmp/foo.idl, line: 5(1): Parse error : Lexer errors


The same problem exists in 1.4.0, 1.4.1 and 2.0