(PDB-2952) fix failing spec tests for ruby 2.2
(PDB-2952) fix failing spec tests for ruby 2.2

Ruby 2.2 as changed URI validation to allow underscores, which we were using in
tests as example invalid URLs. This just changes those tests to use # instead.

rbrw/puppetdb,puppetlabs/puppetdb,waynr/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,rbrw/puppetdb,mullr/puppetdb,senior/puppetdb,senior/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,mullr/puppetdb,waynr/puppetdb,waynr/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,senior/puppetdb,waynr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,senior/puppetdb