Bump src/tests:

Alex Suraci and Dmitriy Kalinin (1):
      mention VCAP_BVT_TRACE in readme

Alex Suraci and Mark Rushakoff (4):
      use first plan listed, instead of assuming 100
      include staging log in failed app starts
      make request log useful
      refactoring

Alex Suraci, Dmitriy Kalinin and Mark Rushakoff (1):
      bump yetis to latest cfoundry; remove uaac