init: Disable log rotation while tests are running
init: Disable log rotation while tests are running

Change-Id: I66d352e79f6bfc26922e3df681ae89d6ae7a0051

BUG=8790
TEST=verify rotation exits early and does not happen while a client test is running

Review URL: http://codereview.chromium.org/4661003

joshfire/chromiumos-platform-init