Wait for subsystems to initialise before sending system ready #925
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Fixes #922
Introducing a new step in the process and that is to wait for all the sub systems to indicate via
SystemMessage.SubSystemInitialized
that they have completed their initialisation.Upon receiving a
SystemMessage.SubSystemInitialized
for each of the sub systems, theSystemMessage.SystemReady
message will be sent.For users using
StartAndWaitUntilReady
the task will only be completed once the sub systems have been initialised which helps with users that want to test with projections for example.