(PDB-3275) Fix zip-tests with new test.check
(PDB-3275) Fix zip-tests with new test.check

The updated version of test.check appears to generate Double/NaN out of gen/any
sometimes, which is problematic because it doesn't equal itself. Replace this
with a slightly customized version which only generates values that equal
themselves.

rbrw/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,mullr/puppetdb,rbrw/puppetdb,mullr/puppetdb