Fix follower notifications flaky spec

spec/features/notifications_spec.rb

@@ -248,7 +248,7 @@ feature "Notifications" do
       create(:follow, :followed_proposal, user: user1, followable: proposal)
       create(:follow, :followed_proposal, user: user2, followable: proposal)
 
-      login_as(author)
+      login_as author.reload
       visit root_path
 
       visit new_proposal_notification_path(proposal_id: proposal.id)
@@ -260,7 +260,7 @@ feature "Notifications" do
       expect(page).to have_content "Your message has been sent correctly."
 
       logout
-      login_as user1
+      login_as user1.reload
       visit root_path
 
       find(".icon-notification").click
@@ -271,7 +271,7 @@ feature "Notifications" do
       expect(page).to have_xpath "//a[@href='#{notification_path(notification_for_user1)}']"
 
       logout
-      login_as user2
+      login_as user2.reload
       visit root_path
 
       find(".icon-notification").click
@@ -282,7 +282,7 @@ feature "Notifications" do
       expect(page).to have_xpath "//a[@href='#{notification_path(notification_for_user2)}']"
 
       logout
-      login_as user3
+      login_as user3.reload
       visit root_path
 
       find(".icon-no-notification").click