Don't spawn another heartbeat for re-registration

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
UnregisterAll during test cleanup

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
Simplify travis discoverd install

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
Add logging to flaky test

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
Merge pull request #21 from flynn/fix-double-register

Don't spawn another heartbeat for re-registration