cryptohome: UnmountAll if crypto migration fails.

UnmountAll is currently called only when the dircrypto migration
succeeds.  For consistency it should also be called if the migration
fails.

BUG=chromium:713556
TEST=cros_workon_make --board=samus --test cryptohome

Change-Id: I65c49f3e5abc727160b086ea5db19957318eda63
Reviewed-on: https://chromium-review.googlesource.com/484179
Commit-Ready: Dan Spaid <dspaid@chromium.org>
Tested-by: Dan Spaid <dspaid@chromium.org>
Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
1 file changed