Temporary performance testing changes

* Disabled all but one method for junitbenchmarks performance-test
  profile and set the jub iteration count to 1 -- the point of this
  change is to make the runtime as short as reasonably possible (30s
  on my box) to ease tooling testing in EC2

* Mix of pom.xml cleanups relating to junitbenchmarks, randomized
  tests, and h2