move utility TestCommon methods into module scope
move utility TestCommon methods into module scope

- move report(), eval_coor_expression(), compare_vectors(), assert_equal()

BubuLK/sfepy,sfepy/sfepy,sfepy/sfepy,rc/sfepy,vlukes/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,sfepy/sfepy