enhance Collection.empty? & Collection.get of DataMapper to prevent sqlite3 local db from the error: database is locked
enhance Collection.empty? & Collection.get of DataMapper to prevent sqlite3 local db from the error: database is locked

Change-Id: I6b49984f00673f40b884d4ee2120ee7e6d9a6fa7

hpcloud/stackato-service-filesystem,ActiveState/stackato-service-filesystem