autotest: Migrate remaining tunnelled EAP tests

Add a new type Tunneled1xConfig which supports PEAP and TTLS
authentication types.  Share the logic to build test cases between the
two types of tests.

TEST=This is a test, it passes.  check1x_WEP and check1x_WPA still pass.
BUG=chromium:256351

Change-Id: Ibf223aa93bb5d361597600169471bddb35c64099
Reviewed-on: https://gerrit.chromium.org/gerrit/61477
Commit-Queue: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
6 files changed