Oracle Linux -> OracleLinux in both ansible_os_family and ansible_distribution: https://github.com/ansible/ansible/pull/10789
(Note - older versions before latest 1.9 had the name including a space - but I can see PR to drop 1.9 support is in progress)
pam_pwfamily (the supposed package to install to get password complexity checking in RHEL7) doesn't seem to exist.
There is a libpwquality package that provides /usr/lib64/security/pam_pwquality.so, but that is installed by default according to a RHEL support case answer.