multiple watchers don't play well together

[bdentino]

if multiple processes are watching the same service, a file change on that service will make them all attempt to restart it. The first one to kill the container wins and the others end up logging errors when they fail to remove because it doesn't exist. this appears to work itself out in the test project once the shared services are back up, but it still seems like something that would cause some hard-to-debug issues occasionally.