Renamed Mailer#test to Mailer#test_email.

--HG--
rename : app/views/mailer/test.html.erb => app/views/mailer/test_email.html.erb
rename : app/views/mailer/test.text.erb => app/views/mailer/test_email.text.erb
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%409080