* Remove Ubuntu 16.04 (Xenial Xerus) from CI.
* Removing PyOpenSSL backend from everywhere but openssl_pkcs12.
* Remove PyOpenSSL support from module_utils that's not needed for openssl_pkcs12.
* Add changelog fragment.
* Install PyOpenSSL and cryptography from PyPi if target Python != system Python.
* Work around some CentOS6, 7, Ubuntu 16.04 problems. Improve jinja2 compatibility handling.
* Skip tasks that require properties that aren't always there.
* Only install OpenSSL when not present.
* Improve output.
* Improve get_certificate integration test graceful failing.
* Fix tests.
* Fix assert.
* OpenSSL peculiarities.
* Fix condition.
* Add openssl_publickey_info module. Share code between openssl_privatekey_info and the new module, and improve documentation of it.
* Move public key loading to support module.
* Require pyOpenSSL 16.0.0 for public key loading.
* Linting.
* Apply suggestions from code review
Co-authored-by: Ajpantuso <ajpantuso@gmail.com>
Co-authored-by: Ajpantuso <ajpantuso@gmail.com>