Handle ntp sync in audioservice ready wait
Handle ntp sync in audioservice ready wait

Events (any python threading in general) don't use monotonic time and
can be affected by an ntp sync.

This replaces the normal event with the MonotonicEvent class handling jumps
into the future.

forslund/mycroft-core,MycroftAI/mycroft-core,MycroftAI/mycroft-core,forslund/mycroft-core