Test

Update course definition to clarify handling of sequential requests. #40

Job	Run time
test_course_definition / js_lint	15s
test_course_definition / identify_language_slugs	3s
test_course_definition / go_lint	3s
test_course_definition / docker_lint	9s
test_course_definition / lint	56s
test_course_definition / markdown_lint	19s
test_course_definition / rust_lint	10s
test_course_definition / validate-schemas	18s
test_course_definition / validate-stages-naming	6s
test_course_definition / verify_templates_compiled	20s
test_course_definition / test (go)	48s
test_course_definition / test (javascript)	30s
test_course_definition / test (python)	26s
test_course_definition / test (rust)	1m 6s
	5m 29s

Provide feedback