add mailru spec
add mailru spec

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