This patch modifies behaviour when TurnPort gets a lifetime
back from server that is shorter than 2 minutes.
Before the patch such lifetime resulted in TurnPort not scheduling any
refresh, leading to timeout on the turn allocation.
After then patch lifetime shorter then 2 minutes leads to refresh
after half stipulated lifetime.
BUG=webrtc:8826
Change-Id: I80561100f2307bd9a6a91af0924bb2814102ddd3
Reviewed-on: https://webrtc-review.googlesource.com/46741
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21891}
19651c3ef2