Going to 100% code coverage here.
Adding comments to LRU cache.
Adding -cover unit test rule.
Code coverage helpers.
Adding an external function IsrunningHealthCheck.
Storing pointers to health records in health.

So we don't copy them around all the time when displaying them.
Fixing test here.
Adding status page fragment for vttablet health.
Using right type for health return.

That way we don't escape the HTML markups.
Adding QPS graph to vtocc and vttablet status.
Update VTGate V2
Update VTGate V2
Merge branch 'master' into liguo
Merge branch 'vtocc'