The RemoteClusterTunnelManager was hanging on the call to
GetReverseTunnels because it did not take a context and thus did
not respect cancellation. During certain shutdown/restart scenarios
the auth server may not respond, which causes Sync to never return
and subsequently prevents Run from ever completing.
By requiring a context to be passed to GetReverseTunnels, we can
remove the hard coded context.TODO that was being sent to the
http client and fully respect cancellation.
rosstimothy
2c226600a7