ST6RI-929 KerML 1.1 Ballot #2 - Model Library

[seidewitz]

This PR updates the KerML library model files Transfer::isInstant and Collections per the resolutions to the following issues approved on KerML 1.1 RTF Ballot 2. Note that both issues primarily require updates to documentation, except as noted below.

• KERML11-9 Typo in documentation of Transfer::isInstant
• KERML11-144 Discrepancy between documentation of Collections library in spec and textual notation file
  Note. The resolution to this issue includes two functional changes to Collections.kerml:
  1. Added an invariant to Map.
  2. Added specialization of OrderCollection to OrderedMap.

The resolution to the following issue also approved on Ballot 2 was already proactively implemented in PR #660 (ST6RI-859).

• KERML11-2 Occurrences::surroundedByOccurrences::surroundingSpace should not be an end feature