Dropped default module options

Removed default=None, type='str' and required=False from all module's
argument_specs with

sed -i \
    -e 's/default=None, //g' \
    -e 's/default=None,//g' \
    -e 's/default=None//g' \
    -e "s/type='str', //g" \
    -e "s/type='str',//g" \
    -e "s/type='str'//g" \
    -e 's/required=False, //g' \
    -e 's/required=False,//g' \
    -e 's/required=False//g' \
    plugins/modules/*.py plugins/module_utils/*.py

and manually cleaned the results because those options values are the
default in Ansible.

Ref.: https://docs.ansible.com/ansible/latest/dev_guide/developing_program_flow_modules.html#argument-spec

Change-Id: Icbc3bb84269d3b8205fac259300902ebdaf6a3ae

plugins/modules/baremetal_node_info.py

@@ -574,8 +574,8 @@ def get_ports_and_portgroups(cloud, machine):
 
 def main():
     argument_spec = ironic_argument_spec(
-        node=dict(required=False),
-        mac=dict(required=False),
+        node=dict(),
+        mac=dict(),
     )
     module_kwargs = openstack_module_kwargs()
     module_kwargs['supports_check_mode'] = True