Split into two roles for esync and ptp-stack
Different setups might be needed in the future involving masters and slaves. The current Ansible role set up only a PTP master with esync. We might need to split this role into two: one to set up esync and another one to setup ptp stack; to make it flexible to make different kinds of setups.
Then the playbook will also need modification.
Anders Harrison flagged it on a review.