UX: rename "Leader" to "Veteran" (first steps)

config/locales/client.en.yml

@@ -1833,7 +1833,7 @@ en:
           newuser: 'Users at Trust Level 0 (New User)'
           basic: 'Users at Trust Level 1 (Basic User)'
           regular: 'Users at Trust Level 2 (Regular User)'
-          leader: 'Users at Trust Level 3 (Leader)'
+          leader: 'Users at Trust Level 3 (Veteran)'
           elder: 'Users at Trust Level 4 (Elder)'
           admins: 'Admin Users'
           moderators: 'Moderators'

spec/fabricators/user_fabricator.rb

@@ -67,7 +67,7 @@ Fabricator(:active_user, from: :user) do
 end
 
 Fabricator(:leader, from: :user) do
-  name 'Leader McLeaderman'
+  name 'Veteran McVeteranish'
   username { sequence(:username) { |i| "leader#{i}" } }
   email { sequence(:email) { |i| "leader#{i}@leaderfun.com" } }
   trust_level TrustLevel.levels[:leader]