Merge branch 'release/0.12.3' into develop
Upgrade leo_commons to 0.14.7
Modify output of message for updated leo_commons
Add libs for communicating with elasticsearch
Upgrade leo_commons to 0.14.8
Implement elasticsearch-appender
Modify test cases
Bump leo_logger to 0.12.4
Merge branch 'release/0.12.4'