SYSML13 — Association decomposition in diagram element tables

In Section 9.2.1 (Extensions to Block Definition Diagram), as modified by Issue 16217, the row for item flows has an internal structure for the association class that does not match its end classes. Similar examples should also be in Section 9.2.1 (Extensions to Internal Block Diagram), and in Section 8.2.2 (Internal Block Diagram).

Change association classes in ports and flows diagram element tables to be
consistent with the end classes of the association, and add examples of
connector properties typed by association classes. Section 8.2.1 (Block
Definition Diagram) and in the water delivery example already have examples of
connector properties typed by an association class.