follow method name change in spec
avoid 'Confirm github repository presence through github api' with option
redirect to root_path if access denied by cancan
Revert "redirect to root_path if access denied by cancan"

This reverts commit 2fdf327563feb8c751d8b12088dfbd64daf8b91c.
remove duplication
Merge pull request #140 from shirakia/iss-138_fix-spec_about_confirming_github

Iss 138 Testを通す