Wrap 0_license initializer in `ee` block

config/initializers/0_license.rb

-begin
+require_dependency 'lib/gitlab'
+
+Gitlab.ee do
+  begin
     public_key_file = File.read(Rails.root.join(".license_encryption_key.pub"))
     public_key = OpenSSL::PKey::RSA.new(public_key_file)
     Gitlab::License.encryption_key = public_key
-rescue
+  rescue
     warn "WARNING: No valid license encryption key provided."
-end
+  end
 
-# Needed to run migration
-if ActiveRecord::Base.connected? && ActiveRecord::Base.connection.data_source_exists?('licenses')
+  # Needed to run migration
+  if ActiveRecord::Base.connected? && ActiveRecord::Base.connection.data_source_exists?('licenses')
     message = LicenseHelper.license_message(signed_in: true, is_admin: true, in_html: false)
     if ::License.block_changes? && message.present?
       warn "WARNING: #{message}"
     end
+  end
 end