Add config dictionary of explicit messages to fail

[apng1982]

Enables testing of specific OrganizationRequest failures, also supporting failures on specific records.

Example use case: I want to be able to test a catch block when a SetStateRequest fails

Example use case: I want to be able to test a catch block when a foreach of SetStateRequest's succeeds on all records but those specifically configured to fail

Example use case: I want to be able to test the exception details returned in a catch block when a SetStateRequest fails

This should be a new node in the Simulator Options model, including a mandatory OrganizationRequest string (?), plus an optional list of GUIDs for records to specifically fail on, (and an optional exception to throw?)