* Include local-oldest-requirements in the constraints when oldest is invoked
* Add oldest constraints for lexicon
* Skip editable requirements during merge
* Pin to lexicon 2.2.1 for oldest requirements. Override locally oldest if needed for specific providers.
This PR updates Lexicon dependency to the latest version available, 3.0.6, for every lexicon-based DNS plugins. It updates also the provider construction to use the new ConfigResolverobject, and to remove the legacy configuration process.
I observed that the current set of oldest requirements do not correspond to any environment, except the specific Xenial image in Travis CI (and standard Xenial containers will also fail).
It is because the requirements make cryptography and requests fail against standard libraries available in the typical Linux distributions that are targeted by the oldest requirements approach (Centos 6, Centos 7, Xenial, Jessie).
This PR fixes that, by aligning the minimal version requirements of cryptography and requests to the maximal versions that are available on Centos 6. Centos 7, Jessie and Xenial stay unusable with oldest requirements for other reasons, but at least one old and supported Linux distribution is able to run the tests with oldest requirements out of the box.
A test is also corrected to match the expected error message that old versions of urllib3 will raise.
* Add tools/merge_requirements.py
* Revert "Fix oldest tests by pinning Google DNS deps (#5000)"
This reverts commit f68fba2be2.
* Add tools/oldest_constraints.txt
* Remove oldest constraints from tox.ini
* Rename dev constraints file
* Update tools/pip_install.sh
* Update install_and_test.sh
* Fix pip_install.sh
* Don't cat when you can cp
* Add ng-httpsclient to dev constraints for oldest tests
* Bump tested setuptools version
* Update dev_constraints comment
* Better document oldest dependencies
* test against oldest versions we say we require
* Update dev constraints
* Properly handle empty lines
* Update constraints gen in pip_install
* Remove duplicated zope.component
* Reduce pyasn1-modules dependency
* Remove blank line
* pin back google-api-python-client
* pin back uritemplate
* pin josepy for oldest tests
* Undo changes to install_and_test.sh
* Update install_and_test.sh description
* use split instead of partition
