Up DBus method call timeout in cryptohome.py

Sometimes slow devices get so bogged down that cryptohome
fails to ACK a method call within the default time out.
Bump it up while we focus on refactoring cryptohomed to
avoid these bottlenecks altogether.

BUG=chromium:344862
TEST=login_MultipleSessions
TEST=http://chromegw/p/tryserver.chromiumos/builders/daisy-paladin/builds/1245

Change-Id: I4237d78db7336515031d8f9e41b521eac9f0c5ac
Reviewed-on: https://chromium-review.googlesource.com/190007
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Will Drewry <wad@chromium.org>
Commit-Queue: Chris Masone <cmasone@chromium.org>
1 file changed