Refactoring around DistCache (#450).
Fix classes leaks in test execution (#442).
Merge remote-tracking branch 'private/issue/442-M13' into 0.7-develop
Merge remote-tracking branch 'private/issue/450-M13' into 0.7-develop
Merge tag '0.7.1-M13' into 0.7-hadoop1-develop

Released version 0.7.1-M13
Revised testing/emulation-mode (#443).
Release date for version 0.7.1 (#443)
Merge remote-tracking branch 'private/issue/443-M14' into 0.7-develop
Merge tag '0.7.1-M14' into 0.7-hadoop1-develop

Released version 0.7.1-M14