create course gorups properly on course import
STUD-1595
Skip language changing tests
Merge pull request #3756 from edx/zoldak/disable-flaky-test

Skip language changing tests
Merge pull request #3640 from edx/zub/bugfix/std1595-importcoursepermission

remove redundent code on course import
disabled test_lms.py:XBlockAcidNoChildTest.test_acid_block
Update Video docs to reflect new UI
Merge pull request #3740 from edx/sylvia/docs/BLD-1032

Update Video component to reflect new UI
Merge pull request #3758 from edx/clytwynec/disable-XBlockAcidNoChildTest

disabled test_lms.py:XBlockAcidNoChildTest.test_acid_block
Added new error message that displays when HTML5 video is not supported altogether. [BLD-638]
Error message is correctly displayed when HTML5 video is disabled by user
Added error message inside video tag instead. Hide spinner when no HTML5 video is defined or video tag not supported.
Removed exclamation point from error message.
Addressed comments.
Corrected acceptance test.
Added acceptance test on spinner visibility.
Set is_spinner_shown to method instead of property.