
Latest pecan release dropped this dependency. This is why now it is needed to explicitly install it during testing. This patch also registers the Neutron core common config options in ``TaasExtensionTestCase``. Since [1], the configuration options must be explicitly loaded. [1]https://review.opendev.org/c/openstack/neutron/+/837392 Closes-Bug: #1982110 Change-Id: I3d8cd840881a2c67e7b07458276d600e214d028e