vpn-manager: Use a different temporary directory for each unit test.
The CL modifies each unit test to use a different temporary directory to
prevent race conditions when unit tests run concurrently.
BUG=chromium-os:33867
TEST=cros_run_unit_tests -p vpn-manager
Change-Id: I5b0b66b4795d14422ea4861411cd8f220103614e
Reviewed-on: https://gerrit.chromium.org/gerrit/32904
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
3 files changed
