Increase timeout in Database_Tests.test26_DocumentExpiry
Increase timeout in Database_Tests.test26_DocumentExpiry

This is a workaround for #1309. We should reduce the timeout back to 5.0 seconds after #1309 is fixed.

couchbase/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios