Functional test add priority inherit test cases

[chinglee-iot]

Add priority inherit and disinherit test cases to verfiy this kernel PR

Description

xTaskPriorityInherit, xTaskPriorityDisinherit and vTaskPriorityDisinheritAfterTimeout need to yield the inherited/disinherited task.

Adding the following test cases to verify the result:

• test_task_priority_inherit_disinherit
• test_task_priority_inherit_disinherit_timeout

Filename	--	--	Line Coverage	--	Functions	--	Branches	--
event_groups.c			95.7 %	176 / 184	100.0 %	16 / 16	72.0 %	72 / 100
list.c			100.0 %	40 / 40	100.0 %	5 / 5	100.0 %	6 / 6
queue.c			95.4 %	726 / 761	100.0 %	47 / 47	97.0 %	456 / 470
stream_buffer.c			94.2 %	309 / 328	100.0 %	26 / 26	95.5 %	189 / 198
tasks.c			99.7 %	1463 / 1468	100.0 %	96 / 96	96.4 %	1008 / 1046
timers.c			100.0 %	243 / 243	100.0 %	30 / 30	96.2 %	76 / 79

Test Steps

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

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