Occupied/Unoccupied Oasis name fix

Fix the name of Oasis.The own Oasis is show like Unoccupied after when we try to send troops etc.

from:
$villageName = “Unoccupied oasis”;
to:
$villageName = $database->getOasisField($oid,"name");
Merge pull request #231 from hexcoded/patch-2

Occupied/Unoccupied Oasis name fix