refactor rename add comments at auth module helpers
if login is required but authentication fail , response INVALID_USER_TOKEN
add comment headers for test cases in application controller rspec
application controller respec: test post#page_disallowed_if_signed_in
application controller respec: test post#page_token_auth_required
application controller respec: test get#page_token_auth
[FIX] helper token_auth: is_signed_in is true when user signed in but authenticate with same phone, invalid token
application controller respec: test post#page_token_auth
Merge branch 'develop-devise' into develop

features:
1. Provider auth helper 'token_auth'
2. Te	st auth helpers 'token_auth', 'token_auth_required', 'disallowed_if_signed_in' in get/post method