Add check for potential course name inconsistencies#34

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jonmcalder wants to merge 2 commits intoswirldev:masterfrom jonmcalder:master

Commits on Oct 21, 2016

Add a basic check to test_course()/test_lesson() to identify potential course name inconsistencies in lesson.yaml files, and also include a test for this test function. This resolves issue swirldev#33
jonmcalder
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Commits on Nov 17, 2016

Get and store currently set lesson at the outset of test_course(), and restore this lesson after the tests have run.
jonmcalder
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