Increase the wait time for a shard to 80 minutes.
Increase the wait time for a shard to 80 minutes.

This should help ensure we  don't drop tests due to them taken to long
to start running, even when we are at full load.

R=maruel@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/23462011

git-svn-id: d5a9b8648c52d490875de6588c8ee7ca688f9ed1@220070 0039d316-1c4b-4281-b951-d872f2087c98

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py