* Update module_utils.six to latest
We've been held back on the version of six we could use on the module
side to 1.4.x because of python-2.4 compatibility. Now that our minimum
is Python-2.6, we can update to the latest version of six in
module_utils and get rid of the second copy in lib/ansible/compat.
With 2.0, we decided to create a special list of param names which were
taken out of the role data structure and stored as params instead (connection,
port, and remote_user). This causes problems with inheritance of these params,
so we are now deprecating that while also keeping those keys in the ds so they
are brought in as attributes on the Role correctly.
Fixes#17395
Role definitions typically require params to be different from those
which are specified as FieldAttributes on the playbook classes used
for roles, however a certain subset should be allowed (typically those
used for connection stuff).
Fixes#14095
Replace .iteritems() with six.iteritems() everywhere except in
module_utils (because there's no 'six' on the remote host). And except
in lib/ansible/galaxy/data/metadata_template.j2, because I'm not sure
six is available there.
FieldAttributes will now by default not be post_validated unless a flag
is set on them in the class, as a large number of fields are really there
simply to be inherited by Task/PlayContext and shouldn't be templated too
early.
The other (unrelated to the base issue) in #12084 is also fixed here, where
the roles field is loaded before vars/vars_files, meaning there are no vars
yet loaded in the play when the templating occurs.
Fixes#12084
