tests: create unit tests for event module

This change adds a new unit test module (bb.tests.event)
for bitbake event.
It includes the following items:

- Client and server stubs setup
- Testing the module's main functions including:
	- get_class_handlers
	- set_class_handlers
	- clean_class_handlers
	- enable_threadlock
	- disable_threadlock
	- get_handlers
	- set_handlers
	- execute_handler
	- fire_class_handlers
	- print_ui_queue
	- fire_ui_handlers
	- fire
	- fire_from_worker
	- register
	- remove
	- register_UIHhandler
	- unregister_UIHhandler
- Testing event handling using:
	- class Event(object)
	- class OperationStarted(Event)
	- class OperationCompleted(Event)
	- class OperationProgress(Event)
	- class ConfigParsed(Event)

[YOCTO #10368]

Signed-off-by: Jair Gonzalez <jair.de.jesus.gonzalez.plascencia@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions