pingerSuite tests consistenly fail on trusty+386 and vivid+amd64

[Curtis Hovey]

We want to move the 386 unit tests to a dedicated fast machine. We cannot because the Juju test suite has never passed on trusty 386. The pingerSuite is the common failure, but the specifc test varies.
    pinger_test.go:92: pingerSuite.TestAgentConnectionDelaysShutdownWithPing
    root_test.go:40: rootSuite.TestPingTimeout

Addendum: Vivid+amd64 also fails because of these tests, but vivid is an openstack instance, not lxc.

[Curtis Hovey (sinzui)]

Attached is an example of one of the failure.

[Curtis Hovey (sinzui)]

This is the non-voting job that shows the problem over many runs http://juju-ci.vapour.ws:8080/job/run-unit-tests-trusty-i386/

[Martin Packman (gz)]

Both of these tests involve time.Sleep calls - I have seen them fail previously running under lxc for what I presumed were speed issues. Ideally the tests get redone to not involve sleeps, but otherwise skipping in some fashion would unblock us.

[Curtis Hovey (sinzui)]

The vivid unit tests no longer run in lxc, but the pinger suites are still among the failures.

[Eric Snow (ericsnowcurrently)]

http://reviews.vapour.ws/r/1256/