s/ansible_local_data_path/ansible_data_path/g

Ansible variable {{ ansible_data_path }} is in use in more than
this role and may get applied to a directory on the remote hosts
as well. Therefor naming it "ansible_local_data_path" would be
misleading, AND it's 6 less characters to type!
ansible-packer 0.4.1
Merge branch 'ansible-packerio-0.4.1'

* ansible-packerio-0.4.1:
  ansible-packer 0.4.1
  s/ansible_local_data_path/ansible_data_path/g