better consistency around email case sensitivity

spec/controllers/session_controller_spec.rb

@@ -119,12 +119,12 @@ describe SessionController do
 
     context 'for a non existant username' do
       it "doesn't generate a new token for a made up username" do
-        lambda { xhr :post, :forgot_password, username: 'made_up'}.should_not change(EmailToken, :count)
+        lambda { xhr :post, :forgot_password, login: 'made_up'}.should_not change(EmailToken, :count)
       end
 
       it "doesn't enqueue an email" do
         Jobs.expects(:enqueue).with(:user_mail, anything).never
-        xhr :post, :forgot_password, username: 'made_up'
+        xhr :post, :forgot_password, login: 'made_up'
       end
     end
 
@@ -132,12 +132,12 @@ describe SessionController do
       let(:user) { Fabricate(:user) }
 
       it "generates a new token for a made up username" do
-        lambda { xhr :post, :forgot_password, username: user.username}.should change(EmailToken, :count)
+        lambda { xhr :post, :forgot_password, login: user.username}.should change(EmailToken, :count)
       end
 
       it "enqueues an email" do
         Jobs.expects(:enqueue).with(:user_email, has_entries(type: :forgot_password, user_id: user.id))
-        xhr :post, :forgot_password, username: user.username
+        xhr :post, :forgot_password, login: user.username
       end
     end