"veyron.io/veyron/...": USe agent in integration tests

This CL modifies most of the integration tests in the core package
so that they use the agent for principal management.

The only tests left are:
1) ./veyron/tools/mgmt/test.sh
2) ./veyron/tools/principal/test.sh (we need to test the principal
command in agent mode)

Change-Id: I61af1f48938e51cfc0c28f74e70fc776089d9376
6 files changed
tree: 2df549c24473ef8827dfccc42b14f53284d07830
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/