As the action plugin is used with the default python interpreter and
the change to python3 for FreeIPA, the use of OTP was not working anymore.

The ansible_python_interpreter is not automatically used for the module
part of the action plugin. Therefore ansible_python_interpreter needed to
be added to the action plugin call as a new var to make sure that the
module part is used with the proper python version.

Also a new import for the Python2/3 import test has been added to discover
of the server is supporting python2 or python3. The old
ansible_python_interpreter setting is saved before doing this and restored
after the one-time password has been generated on the server.