Function get2qzSubdir( name )

Description:
Returns the name of the subdirectory (such as "ra03_04") for a given 2QZ object name (ID).
Parameters:
name (String)
ID of object within the 2QZ catalogue (like J120437.7-021003)
Return Value (String):
subdirectory name
Signature:
String get2qzSubdir(String)