add test case for in operator on object database.
Merge pull request #1237 from tglman/master

Add of test case about in opreator in object database
Merge branch 'master' of https://github.com/nuvolabase/orientdb
Fixed bug on reopening db with dirty indexes

Now dirty indexes are removed to avoid the db is unusable
Merge branch 'master' of https://github.com/FHeNuS/orientdb