Pass all environment variables to tox.

Author: robert-de-bock

tox.ini

@@ -11,7 +11,7 @@ setenv =
     ANSIBLE_FORCE_COLOR=1
     ANSIBLE_ROLES_PATH=../
 
-passenv = namespace, image, tag, DOCKER_HOST
+passenv = *
 
 # Test supported releases of ansible-core. See:
 # https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html#ansible-core-support-matrix