Librarian should not set the module_repository PE >=3.2

PMT in Puppet Enterprise 3.2 and greater expects to talk to the v3
forge api. This does not exist at forge.puppetlabs.com which is the
default for librarian-puppet Puppetfiles. librarian-puppet should not set
module_repository option when calling PMT to fix this. This will break
installs from pulp and should be reconsidered when librarian-puppet and pulp
are updated to the v3 forge api.

In addition newer versions of PMT enforce some additional rules when
installing modules that probably don't make sense for librarian. Instead
of --ignore-dependencies librarian should use --force.