* Ensure we do not start discovered flows until after the start event has fired
This change makes zeroconf and ssdp match discovery behavior of not
creating config flows until the start event has been fired. This
prevents config flow creation/dependency installs for discovered
config flows from competing for cpu time during startup.
* Start discovery/service browser/ssdp when EVENT_HOMEASSISTANT_STARTED is fired instead of EVENT_HOMEASSISTANT_START
* used coroutinemock to avoid exception
* added spec to mock to remove exception
* added the current_user return value so it doesnt throw exception
* fix the mocks so properties do not need .return_value
* fixed missing mock values that were causing exceptions
* moved patch to asynctest so no need to define m_init
* fixed black error
J. Nick Koston
Paulus Schoutsen
Ziv
Franck Nijhof
Bas Nijholt
Paulus Schoutsen