MB-32364: Test for regression of expiration decoding error
MB-32364: Test for regression of expiration decoding error

This test is forward-ported from Alice, and tests an issue where
the expiration would get reset on a single path mutation if
docflags were included in extras. This commit includes no fix to this
as this has already been resolved implicitly by the FlexExtras
refactor http://review.couchbase.org/#/c/101946/

Change-Id: I1c79e93c12fa511607317cf0b03df7e575b0caa7
Reviewed-on: http://review.couchbase.org/102923
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

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