Fix #1287: Reorganize package names and artifacts
Merge pull request #1317 from gzm0/renames

Renamings
Fix #1320: Allow multiple message sends in TestAdapter

This commit eliminates confirmation messages from the JS slave to the
JVM orchestrator on client messages (the "msg:" message). The slave
may still send a fail message but does not confirm reception of the
message anymore. This avoids having nested reception loops that expose
races.