Fix issue with replication when replicationDelay is set to zero

Issue is cause by race condition. When replicationDelay is set
to zero the task is triggered immediately.
Source.requestRunway(FetchOne) is removing task from pending
as a first operation when task is starting. But  without delay
task will be added to pending when it is already running and will
never be removed from pending which cause further replication to
add refs to task which is already finished instead of creation
new one.

Bug: Issue 13099
Change-Id: If8ede575ceb0ae50e8192198c1321f4f7a3e46a6
1 file changed
tree: b935f248ca7f48a7c0975cfdcb2dfce4fa78aee8
  1. BUILD
  2. Jenkinsfile
  3. LICENSE
  4. src/