Merge pull request #295 from sot/lingering-sybase

Update one remaining sybase call to use sqsh

mica/archive/obsid_archive.py

@@ -737,7 +737,7 @@ def update(self):
         prov_data = self.get_todo_from_links(archive_dir)
         for obs in prov_data:
             # check again for multi-obis and limit to first one
-            with ska_dbi.DBI(**apstat) as db:
+            with Sqsh(**apstat) as db:
                 obis = db.fetchall(
                     "select distinct obi from obidet_0_5 where obsid = %d"
                     % obs['obsid'])