I'm not using Ansible inside CI yet, but I remember having had to adapt some 1.9 playbooks for 2.x. [1]
Perhaps also worth mentioning, Ansible 2.2.1.0 fixed CVE-2016-9587, CVE-2016-8647, CVE-2016-9587 and CVE-2016-8647 (the first is about a compromised remote system being able to run commands on the Ansible controller - I think 1.9 is also vulnerable [2]). Unless we can afford to quickly backport such security fixes, wouldn't it be better to use the EPEL version everywhere inside CentOS?
Regards,
Laurențiu