Major bug fix in the space creation listener of JanusContextSpaceService.
The listener on space creation in JanusContextSpaceService did not notify the service's listeners for the creation of spaces at the service's start stage.
It is due to the condition "if (isRunning)", which avoid to notify the listeners until the service has finished to be initialized.
Unfortunately, the initial creation (coming from Hazelcast synchronization) is done in the doStart of the service.
This condition is removed.
Avoid to have multiple ZeroMQ socket subscriptions for the same space.
In the previous implementation, the ZeroMQ layer is subscribing many times to the same pair peer/space.
Add the cancelation functions for the AgentTasks.
Merge branch 'master' of https://github.com/janus-project/janusproject