While neither the FreeBSD provisioner nor the SUSE provisioner support
installing Ansible using pip their ansible_install methods still get
called with that fourth argument. The result being these errors when
Vagrant tries to install Ansible.
/opt/vagrant/embedded/gems/gems/vagrant-1.9.5/plugins/provisioners/ansible/cap/guest/freebsd/ansible_install.rb:10:in `ansible_install': wrong number of arguments (4 for 3) (ArgumentError)
/opt/vagrant/embedded/gems/gems/vagrant-1.9.5/plugins/provisioners/ansible/cap/guest/suse/ansible_install.rb:9:in `ansible_install': wrong number of arguments (4 for 3) (ArgumentError)
The Arch provider, it too without pip support, already catches the
pip_args argument this way.