Merge branch 'release/0.12.17' into develop
Support eleveldb
Upgrade rebar
Add basho_bench plugin
Merge branch 'feature/support-eleveldb' into develop
Upgrade bitcask to v0.1.6.3
Modify require otp vsn - add R16B02
Upgrade leo_commons to 0.14.6
Roll leo_backend_db version 0.14.0
Merge branch 'release/0.14.0'