lookup Java Type
Look up the given Java class name, and create a suitable Java POJO A_Type. Capture the classParameters, since the Avail POJO mechanism doesn't erase generics.
Return
An A_Type representing the specialized Java class.
Parameters
class Name
The full name of the Java class.
class Parameters
The type parameters for specializing the Java class.
Throws
If the class can't be found or can't be parameterized as requested, or if it's within the forbidden avail namespace.