"veyron/services/mgmt": Prevent credentials sharing in shell tests

This CL modifies the shell tests in veyron/services/mgmt/...,
veyron/tools/debug, and veyron/tools/principal to prevent them from
simultaeneously running multiple processes that share the same
credential directories.

Change-Id: I2a42bd1efdd29a375c5460e4e1830d75ac5a9a00
6 files changed
tree: 6a9d09fd2be7ca03ceac555ec08acca074269666
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/