Create Inherited TestGlobusAPI class with protected methods to test the private curl methods

[nedvedba]

The GlobusAPI class is currently untestable because the methods are private, so a new class must be created to inherit GlobusAPI to be able to call those private methods.

[JoshuaSBrown]

Acceptance

A Globus test class is created in the GlobusAPI unit test that inherits from GlobusAPI class, the unit test runs and the protected methods are directly callable.