Reload before checking for related EssenceNodes
Reload before checking for related EssenceNodes

The most recent version of AwesomeNestedSet stops reloading `self` when
saving. This leads to `self` having inaccurate values for `lft` and
`rgt` in our spec, making `node.self_and_descendants` sometimes not find all
children.

Luckily our specs found this.

mamhoff/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,mamhoff/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,mamhoff/alchemy_cms,AlchemyCMS/alchemy_cms