Fix two test issues:
- pidof is not available in PATH on some Jenkins systems (rhel, centos)
Use kill -0 instead.
- Cleanup after plugin test. This is a stop gap fix. The right way to
fix this, is to shutdown the plugin on daemon shutdown path (except
for the live-restore case). This will be done in a follow up PR.
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
Upstream-commit: 6d36431e2395867d7bb101dbfd4340e132fd5438
Component: engine