remove TestCommon, fix compare_vectors(), assert_equal()
remove TestCommon, fix compare_vectors(), assert_equal()

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