Use GTEST_SKIP() in testapp
Use GTEST_SKIP() in testapp

GTEST_SKIP() is integrated in gtest, so it'll print out that it
skipped the test similar to the ones that are disabled by prefixing
the test with DISABLED.

Change-Id: I26417af3c6bf0e765146dc2580b0f81838c0519d
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/132224
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Richard de Mellow <3b8534f7ae49c77465cd6f1b512f27ec39f3eddd@couchbase.com>

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