Fix the settings import in the search index management command.
Fix the settings import in the search index management command.

"import settings" should have been "from django.conf import settings".

Fixes bug 2872.

beol/reviewboard,sgallagher/reviewboard,chipx86/reviewboard,custode/reviewboard,custode/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,chipx86/reviewboard,brennie/reviewboard,KnowNo/reviewboard,davidt/reviewboard,bkochendorfer/reviewboard,brennie/reviewboard,sgallagher/reviewboard,1tush/reviewboard,sgallagher/reviewboard,beol/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,davidt/reviewboard,beol/reviewboard,KnowNo/reviewboard,1tush/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,custode/reviewboard,davidt/reviewboard,1tush/reviewboard,1tush/reviewboard,1tush/reviewboard,sgallagher/reviewboard,1tush/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,1tush/reviewboard,custode/reviewboard,chipx86/reviewboard,bkochendorfer/reviewboard,davidt/reviewboard,reviewboard/reviewboard,beol/reviewboard,KnowNo/reviewboard,1tush/reviewboard,reviewboard/reviewboard,1tush/reviewboard