NotUniqueIndex: fixed back compatibility
Restored missed file in 1.6.2
Merge branch 'hotfix-1.6.3' of https://github.com/nuvolabase/orientdb into hotfix-1.6.3
Hash index iteration was fixed.
Merge branch 'hotfix-1.6.3' of https://github.com/orientechnologies/orientdb into hotfix-1.6.3
Merge branch 'hotfix-1.6.3' into develop