MB-16181: Filters with deleted collections

MB-16181: Filters with deleted collections

Upstream integration revealed an issue with the VB::Filter.
If we construct a filter with a collection "X" and "X" is actually
marked as deleted, "X" should not be part of the filter.

We fix this by replacing VB::Manifest::doesCollectionExist with
VB::Manifest::isCollectionOpen which performs the correct checks.

Tests updated to cover this case.

Change-Id: I38d4ba025805da7653bf3a84053d4280f4f547d7
Reviewed-on: http://review.couchbase.org/78570
Reviewed-by: Dave Rigby <daver@couchbase.com>
Tested-by: Build Bot <build@couchbase.com>