use :order_column option instead of :order for acts_as_nested_set

git-svn-id: http://svn.redmine.org/redmine/trunk@12680 e93f8b46-1217-0410-a6f0-8f06a7374b81
back out r12680

<pre>
  1) Failure:
test_children(ProjectTest) [test/unit/project_test.rb:374]:
<[5, 3, 4]> expected but was
<[3, 4, 5]>.
</pre>

git-svn-id: http://svn.redmine.org/redmine/trunk@12681 e93f8b46-1217-0410-a6f0-8f06a7374b81
move awesome_nested_set leaf? modification to config/initializers/10-patches.rb

git-svn-id: http://svn.redmine.org/redmine/trunk@12682 e93f8b46-1217-0410-a6f0-8f06a7374b81
call Project#set_or_update_position_under in Project.rebuild_tree! (#12431)

git-svn-id: http://svn.redmine.org/redmine/trunk@12683 e93f8b46-1217-0410-a6f0-8f06a7374b81
back out r12679 awesome_nested_set 2.1.5 modification

git-svn-id: http://svn.redmine.org/redmine/trunk@12684 e93f8b46-1217-0410-a6f0-8f06a7374b81
graft r5285 to awesome_nested_set 2.1.5 (#7920)

git-svn-id: http://svn.redmine.org/redmine/trunk@12685 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Project#acts_as_nested_set :order => 'name' option

git-svn-id: http://svn.redmine.org/redmine/trunk@12686 e93f8b46-1217-0410-a6f0-8f06a7374b81
import awesome_nested_set 2.1.6

https://github.com/collectiveidea/awesome_nested_set/commit/64cc8bc8cf93e8859a21bcf25c36675080e42ce6

git-svn-id: http://svn.redmine.org/redmine/trunk@12687 e93f8b46-1217-0410-a6f0-8f06a7374b81
add lib/plugins/awesome_nested_set/init.rb

git-svn-id: http://svn.redmine.org/redmine/trunk@12688 e93f8b46-1217-0410-a6f0-8f06a7374b81
graft r5285 to awesome_nested_set 2.1.6 (#7920)

git-svn-id: http://svn.redmine.org/redmine/trunk@12689 e93f8b46-1217-0410-a6f0-8f06a7374b81