new checkpoint for TestGL - Issue 107

New checkpoint to address Issue 107

CP: Define the test suite scope
The test suite MUST define it scopes, goal, and intended purpose.

Rationale: When writing test suites it is critical to understand their 
primary purpose and scope. The scope describes the areas covered by the 
test suite, thereby indicating the applicability of the test suite, the 
motivation and objectives, and coverages.  For example, the goals, intended 
purpose, and coverage of tests for a CR document may be different than 
those for Rec.   Note, a WG may have multiple test suites for different 
parts of a specification (e.g., profiles or modules) or for different 
applications of the specification (e.g., bindings, things like CSS in 
MathML CSS  with WCAG etc)