Correctly set default projects limit for new users.

app/models/user.rb

@@ -55,14 +55,13 @@ class User < ActiveRecord::Base
   include Gitlab::ConfigHelper
   include TokenAuthenticatable
   extend Gitlab::ConfigHelper
-  extend Gitlab::CurrentSettings
+  include Gitlab::CurrentSettings
 
   default_value_for :admin, false
   default_value_for :can_create_group, gitlab_config.default_can_create_group
   default_value_for :can_create_team, false
   default_value_for :hide_no_ssh_key, false
   default_value_for :hide_no_password, false
-  default_value_for :projects_limit, current_application_settings.default_projects_limit
   default_value_for :theme_id, gitlab_config.default_theme
 
   devise :database_authenticatable, :lockable, :async,
@@ -141,6 +140,7 @@ class User < ActiveRecord::Base
 
   before_save :ensure_authentication_token
   after_save :ensure_namespace_correct
+  after_initialize :set_projects_limit
   after_create :post_create_hook
   after_destroy :post_destroy_hook
 
@@ -463,6 +463,13 @@ class User < ActiveRecord::Base
     end
   end
 
+  def set_projects_limit
+    connection_default_value_defined = new_record? && !projects_limit_changed?
+    return unless self.projects_limit.nil? || connection_default_value_defined
+
+    self.projects_limit = current_application_settings.default_projects_limit
+  end
+
   def requires_ldap_check?
     if !Gitlab.config.ldap.enabled
       false