MDMI2 — Global - changed name of StatementContext property to ContextConcept

In MDMI 2.0, we added two properties in the MDMI Business Element Reference Class; the StatementContext property and the DataElementConcept property. The name StatementContext is too limiting as there are concepts in the SEER the not only as defined in a "speech act" but can also be used to define a semantic of a more broader concept of Situation.