(maint) acceptance config cleanup

This commit removes the full template path from all our acceptance configs[1], and replaces vcloud.delivery.puppetlabs.net with vmpooler.delivery.puppetlabs.net. It also removes the 'filecount' config parameter since it isn't used for anything.

[1] The template path isn't used for anything. Beaker's `VcloudPooled` hypervisor actually ignores it: https://github.com/puppetlabs/beaker/blob/1f4aaef63197751a8203a21981938ff6cecd2041/lib/beaker/hypervisor/vcloud_pooled.rb#L59-L62