Add retries to login_CryptohomeTelemetry

This test fails sporadically, and is resulting in lost CQ runs. Only the
control file needs to be modified for this, the test itself already
throws a retryable exception.

BUG=chromium:338579
TEST=None

Change-Id: I0f763239a19da063146cb87f1619c052c777a4f5
Reviewed-on: https://chromium-review.googlesource.com/184016
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
1 file changed