Update spec for TelemetrySubscription to account for the fact
that it initially calls back when the set of telemetry objects
is available (which supports views such as Fixed Position
which want to defer all telemetry-handling responsibility to
the subscription.) WTD-879.
Add a test case for subscriptions which should be handled
losslessly (that is, which should notify subscribers once
per data event, not once per execution cycle.) This
test case reflects the underlying cause for WTD-784.
Complete test coverage for new scripts added to bundle
platform/telemetry in support of autoflow tabular views,
WTD-614. Specifically, these implement a telemetrySubscriber
service which can be used to watch for updates to telemetry
values associated with a specific domain object.
