GOC System Testing

Create system testing module for GOC with fake ART-DECOR project, covering all HL7 specifications.
Based on:
https://docs.google.com/spreadsheets/d/1BMkyOBZbuVOnbp8wLH0ZELB34v2pUee9ll4CEPDiCwQ/edit?usp=sharing

This story includes:
   + Verify (add if missing) the coverage of all HL7 elements
   + Link tests with the document, and generate coverage report (GOC Specific annotations)
   + Create the module for system testing
          - Define module APIs & Abstractions --> DONE
          - Develop all implementations --> DONE
          - Release first prototype ---> DONE
          - Create fake ART-DECOR Project + CDA Samples (for all cases) --> 85%
                  * Cardinality: DONE
                  * Mandatory: DONE
                  * Vocabulary: DONE
                  * FixedVal: DONE
                  * Datatype: DONE
                  * Context: DONE
                  * Global: DONE
                  * Closed: Not Supported
                  * Choice: Pending => [~aai] [~nab] + échange équipe fonctionnel
          - Report Generator ---> DONE

RAF for [~nab] intership:
- Specifications to be covered: Asserts, Map untestable specs with global ones (ex: NullFlavor, containements, includes...)
  1. Analyse existing code and coverage (technically) --DONE
  2. Generate a small report of what we have actually processed and tested --60%
  3. Complete missing explicit (not NullFlavor, containement ...) specifications and / or test cases
  4. Find solution for untestable specs (ex: NullFlavor, containements, includes...) in System testings

- dependency on improvement GocTestingEntry class with [~aai]


Objectives:
 - Reach 95% of functional coverage for HL7 standards (exclude choices)