Fix Jenkins URL in Vagrantfile.

Author: geerlingguy

jenkins/Vagrantfile

@@ -5,7 +5,7 @@ VAGRANTFILE_API_VERSION = "2"
 
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.box = "geerlingguy/centos7"
- config.vm.hostname = "jenkins.dev"
+ config.vm.hostname = "jenkinsci.dev"
  config.vm.network :private_network, ip: "192.168.76.76"
  config.ssh.insert_key = false