Moved the YUI sandbox into the describe closure

Moved the YUI sandbox into the describe closure

For whatever reason one of the describe closures in test_model.js
was wrapped in a YUI sandbox. This caused whatever test suite was 
run after it in .only mode to fail with an extend failure. Moving
the YUI sandbox inside to match our other tests has solved this.

https://code.launchpad.net/~hatch/juju-gui/model-test-fix/+merge/156091

(do not edit description out of merge proposal)

[jeff.pihach, 2013-03-28 23:45:22]

Please take a look.

[gary.poster, 2013-03-28 23:49:43]

LGTM.  Thank you!

Gary

[rharding, 2013-03-28 23:50:43]

LGTM and I qa'd that it fixes the issue where notification.only() was set. This
corrects that as well. Thanks for chasing it down.

[jeff.pihach, 2013-03-28 23:55:34]

*** Submitted:

Moved the YUI sandbox into the describe closure

For whatever reason one of the describe closures in test_model.js
was wrapped in a YUI sandbox. This caused whatever test suite was 
run after it in .only mode to fail with an extend failure. Moving
the YUI sandbox inside to match our other tests has solved this.

R=gary.poster, rharding
CC=
https://codereview.appspot.com/8099047