swap user's name and the user's username

app/views/projects/commit/_valid_signature_badge.html.haml

@@ -16,8 +16,8 @@
         = user_avatar_without_link(user: user, size: 32)
 
       %div
-        %strong= gpg_key.user.username
-        %div= gpg_key.user.name
+        %strong= gpg_key.user.name
+        %div @#{gpg_key.user.username}
   - else
     = mail_to user_email do
       %div

spec/features/commits_spec.rb

@@ -285,8 +285,8 @@ describe 'Commits' do
       click_on 'Verified'
       within '.popover' do
         expect(page).to have_content 'This commit was signed with a verified signature.'
-        expect(page).to have_content 'nannie.bernhard'
         expect(page).to have_content 'Nannie Bernhard'
+        expect(page).to have_content '@nannie.bernhard'
         expect(page).to have_content "GPG Key ID: #{GpgHelpers::User1.primary_keyid}"
       end