cubicweb-vcsfile #1958220 task doing repo pull should watch the repository being shutting down [resolved]

as its thread may: * don't receive the KeyboardInterrupt or shutdown signal * loop a while without accessing the session (until some repository is actually not up-to-date) (access to the session should abort the task)

prioritynormal
typebug
done in1.8.7
load0.100
load left0.000
closed by#059bc3a9d30f closes #1958220: we have to watch ourselves for repo shutdown