Closes #1143: Remove all fixtures

 - removed all fixtures
 - removed all fixtures calls
 - Edited some tests to replace fixtures with blueprint
fix problem with fixtures/ directory

 - moved files called by fixture_file_upload in
test/fixtures{files/classlist-csvc}
Removed a comment
Fix: tests with FlexibleCriterion
removed other useless variables
Merge pull request #1144 from GhiGt/issue-1143

Closes #1143: Remove all fixtures.