entd: expect cryptohome to initialize pkcs11 by default

TEST=bvt && below:
1) Log into device without tpm token
2) load enterprise extension and get a certificate
3) log out
4) log in, certificate persists
5) verify secure_certificates it not a crosh command
6) verify if pkcsslotd is started slowly by cryptohome the
   extension/entd recovers ok not needing to have entd
   start after pkcsslotd.

Change-Id: I651b04dde445966c5f698e23f0636b0d692687a7
Reviewed-on: http://gerrit.chromium.org/gerrit/1272
Tested-by: Ken Mixter <kmixter@chromium.org>
Reviewed-by: Robert Ginda <rginda@chromium.org>
4 files changed