FakeVim: Explicitly enable some options for tests

Since there is now separate configuration for tests
(f3ca72f989e9a8e8c1933c165aff74ee85c01228) it became obvious that
indentation options are disabled by default.

Change-Id: If13b16b05c5f11171aa49d6964d7e55e2a790646
Reviewed-by: hjk <hjk121@nokiamail.com>