Solve issue #2 MUST include the public APIs

Author: mariojmdavid

content/06.quality_criteria.md

@@ -36,7 +36,7 @@ design analysis or side-effects to external systems.
 * **[SvcQC.Fun01]** Functional testing SHOULD tend to cover the full set of functionality that
   the **Service** claims to provide. [SQA-QC.Fun01].
   * **[SvcQC.Fun01.1]** Functional tests SHOULD be checked automatically.
-  * **[SvcQC.Fun01.2]** Functional tests SHOULD include the public APIs of the **Service**.
+  * **[SvcQC.Fun01.2]** Functional tests MUST include the public APIs of the **Service**.
   * **[SvcQC.Fun01.3]** Functional tests SHOULD include the Web interface of the **Service**.
 
 * **[SvcQC.Fun04]** Functional tests SHOULD be provided by the developers of the inderlying