contrib/vagrant/Vagrantfile

hgweb: filter graphmod.colored() output before iterating over it

Consumers in this function use output of graphmod.colored(), but only want
items with type == CHANGESET, so let's filter it early.

This is primarily just a refactoring, but it also fixes a potential small bug
with `rows = len(tree)` (this variable is used for "Rows shown" line in
raw-graph) if there are items of other types.

# -*- mode: ruby -*-

Vagrant.configure('2') do |config|
  # Debian 8.1 x86_64 without configuration management software
  config.vm.box = "debian/jessie64"
  config.vm.hostname = "tests"

  config.vm.define "tests" do |conf|
    conf.vm.provision :file, source: "run-tests.sh", destination:"run-tests.sh"
    conf.vm.provision :shell, path: "provision.sh"
    conf.vm.synced_folder "../..", "/hgshared"
  end
end