"core": Shell tests must use the agent

This CL moves the veyron/tool/mgmt and veyron/services/identity
shell tests so that they only use a principal supplied by the agent
(as opposed to the VEYRON_CREDENTIALS directory).

With this CL, all shell tests in the core package would switch to
using the agent.

Change-Id: I986a646381d2b129698402f7fe82f9730b3b6a0c
3 files changed
tree: b5606ca236aa2321d28e02162f979a7e559a8bc5
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/