Upgraded to BP 2.4.0-SNAPSHOT
Merge pull request #1423 from henryzhao81/master

Fix 1406, exception when starting distribute mode
Merge branch 'master' of https://github.com/nuvolabase/orientdb
Fixed bug on empty results
Ignored patch from Pull Request #1423 didn't pass ANT test cases
version of com.orientechnologies.orient.core.config.OStorageConfiguration was incremented.
Back compatibility with version 4 was added.
Merge pull request #1425 from logart/master

Back compatibility problem fix.
index out of bounds fix in concurrent cache test
Fix wrong imports
Merge pull request #1426 from logart/master

Fix for concurrent cache test
Merge pull request #1427 from danieletorelli/master

Fix wrong imports