removed block-variable shadowing warning in Rakefile
removed block-variable shadowing warning in Rakefile

sbhalerao/CIYH_ver3,intridea/omniauth,github/omniauth,sbhalerao/CIYH_ver3,sideci-sample/sideci-sample-omniauth,sbhalerao/CIYH_ver2,sbhalerao/CIYH_ver1,sbhalerao/CIYH_ver1,sbhalerao/CIYH_ver1,sbhalerao/CIYH_ver3,ayunav/omniauth,sbhalerao/CIYH_ver2,poznyakandrey/omniauth,sbhalerao/CIYH_ver3,ngpestelos/omniauth,sbhalerao/CIYH_ver2,fxposter/omniauth,sbhalerao/CIYH_ver1,toyokazu/omniauth_shibboleth,sbhalerao/CIYH_ver3,thomasmillergb/Year2-ruby-software-hut,nbrustein/omniauth,mihar/omniauth-timekiwi,likeberi/omniauth,dougal/omniauth,needto/omniauth,sbhalerao/CIYH_ver2,jamescallmebrent/omniauth,yui-knk/omniauth,omniauth/omniauth,sbhalerao/CIYH_ver1,sbhalerao/CIYH_ver2,twalpole/omniauth,thomasmillergb/Year2-ruby-software-hut,sbhalerao/CIYH_ver2