I've got a few weeks worth of data for runs=5 from which
I can check how often time-based values had false negatives.
Let's see if runs=7 performs better (more evenly distributed
between faster and slower), or worse (more likely to get a
super slow result that is otherwise absent).
Change-Id: I38e9b4c2c3c2f4832fc0e9244a00a723510d295f
Per T216854, it's now supported to give the scenarios a name.
This way, the Jenkins build will have headings like "scenario View a page"
instead of "scenario 0", which is difficult to look up or
understand without the config file side-by-side.
Change-Id: If9884c38eef8b05637a8045c4beb3f2bbf8f5de5
