MB-10513: compaction must honor drop deletes flag

This is because passing the flag onto couchstore compaction
api is not valid if there is a callback hook also in place

Change-Id: I76875c75dff6c3c2155a30814907b6dc03095427
Reviewed-on: http://review.couchbase.org/34745
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Sundararaman Sridharan <sundar@couchbase.com>
Tested-by: Sundararaman Sridharan <sundar@couchbase.com>