ep_testsuite: remove compression=off variants
ep_testsuite: remove compression=off variants

We currently have three compression variants for all ep_testsuite_*
tests (in addition to the full/value/ephemeral dimension). Given that
none of the ep_testuite tests actually insert compressed values (see
module_tests/evp_engine_tests for targetted compression tests),
there's little value in running both 'passive' and 'off' variants as
they are essentially identical (and increase test runtime by 33%).

As such, remove the 'off' variants for ep_testsuite.

Change-Id: I2a234477b4f63b5767a369a6bb71cb10be106e6d
Reviewed-on: http://review.couchbase.org/96851
Reviewed-by: Paolo Cocchi <9dd88c9f3e5cbab6e19a6c020f107e0c648ac956@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine