Update to API 2.1.23
prepare release 2.1.5
update to snapshot version 2.1.6-SNAPSHOT
prepare release 2.1.6
update to snapshot version 2.1.7-SNAPSHOT
prepare release 2.1.7
update to snapshot version 2.1.8-SNAPSHOT
prepare release 2.1.8
update to snapshot version 2.1.9-SNAPSHOT
prepare release 2.1.9
update to snapshot version 2.1.10-SNAPSHOT