vchoi_fork

[svn-r3708] Purpose: Code cleanup and adding more test

Description:
    dsets.cpp:
	- Added routine's headers to be consistent with the C tests
	- Added the following tests (they are not in the C version
	test because they are C++ specific):
	    + Test copying a user-defined type using DataType::copy
	    + Test copying a user-defined type using DataType::operator=
	    + Test copying a user-defined int type using DataType::operator=
	    + Test copying an integer predefined type using a constructor
	    + Test copying an integer predefined type using DataType::operator=

    th5s.cpp:
	- Added routine's headers to be consistent with the C tests
	- Cleanup old couts and statements used during debugging

Platforms tested:
    arabica (sparc-sun-solaris 2.7)