Downgrade ansible to 2.0.2

[fullyint]

The latest Trellis will work with Ansible 2.1.1, as mentioned in the requirements:

Ansible >= 2.0.2 (except 2.1.0)

Notes on installing specific versions of Ansible:

@swalkinshaw

Pip

pip install ansible==2.0.2.0

Homebrew

brew switch ansible 2.0.2.0

More on specific brew versions here: Homebrew install specific version of formula? - Stack Overflow