update sysutils/ansible* ports

sysutils/ansible: 2.7.1
Changes: https://github.com/ansible/ansible/blob/v2.7.1/changelogs/CHANGELOG-v2.7.rst

sysutils/ansible26: 2.6.7
Changes: https://github.com/ansible/ansible/blob/v2.6.7/changelogs/CHANGELOG-v2.6.rst

sysutils/ansible25: 2.5.11
Changes: https://github.com/ansible/ansible/blob/v2.5.11/changelogs/CHANGELOG-v2.5.rst

All ports: move default configuration directory back to LOCALBASE/etc/ansible as
before the flavors conversion. Configuration is version-specific and not Python-specific
and this is a more intuitive location.

PR: 232377
Reported by: Tomoyuki Sakurai (default configuration path)