PERL-443 Fix "collection_names with filter" test in t/database.t
PERL-443 Fix "collection_names with filter" test in t/database.t

Fixes test regression introduced in 260159e against 2.4 clusters.

Post-2.4 servers translate "capped: 1" to "capped: true"; servers with
version 2.4 and earlier do not.

mongodb/mongo-perl-driver,xdg/mongo-perl-driver,xdg/mongo-perl-driver,dagolden/mongo-perl-driver,mongodb/mongo-perl-driver,xdg/mongo-perl-driver,dagolden/mongo-perl-driver,mongodb/mongo-perl-driver,dagolden/mongo-perl-driver,dagolden/mongo-perl-driver