RFR: JDK-8223803: j.l.c.MethodTypeDesc::insertParameterTypes​ doesn't control type of parameters

[Vicente Romero]

Please review fix for [1] at [2] and the related CSR at [3]. Method 
java.lang.constant.MethodTypeDesc::insertParameterTypes​ should control 
the type of parameters being inserted. In particular, no parameter can 
be a class descriptor of primitive type |void|. This fix is updating the 
spec of the mentioned method plus it is adding a test to make sure that 
the implementation is in sync with the specification. As mentioned in 
the CSR and apiNote has been added to method 
j.l.c.ConstantDesc::resolveConstantDesc to clarify that a method type 
descriptor can have more than 255 argument slots so at resolution time, 
as a j.l.i.MethodType, errors can be thrown.

Thanks,
Vicente

[1] https://bugs.openjdk.java.net/browse/JDK-8223803
[2] http://cr.openjdk.java.net/~vromero/8223803/webrev.00/
[3] https://bugs.openjdk.java.net/browse/JDK-8223997