nova_compute: indicate argument type (#4070)

Without this, ansible 2.1 will convert some arguments that are
meant to be dict or list type to their str representation.

Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>

lib/ansible/modules/cloud/openstack/_nova_compute.py

@@ -540,17 +540,17 @@ def main():
         flavor_include                  = dict(default=None),
         key_name                        = dict(default=None),
         security_groups                 = dict(default='default'),
-        nics                            = dict(default=None),
+        nics                            = dict(default=None, type='list'),
-        meta                            = dict(default=None),
+        meta                            = dict(default=None, type='dict'),
         wait                            = dict(default='yes', choices=['yes', 'no']),
         wait_for                        = dict(default=180),
         state                           = dict(default='present', choices=['absent', 'present']),
         user_data                       = dict(default=None),
         config_drive                    = dict(default=False, type='bool'),
         auto_floating_ip                = dict(default=False, type='bool'),
-        floating_ips                    = dict(default=None),
+        floating_ips                    = dict(default=None, type='list'),
-        floating_ip_pools               = dict(default=None),
+        floating_ip_pools               = dict(default=None, type='list'),
-        scheduler_hints                 = dict(default=None),
+        scheduler_hints                 = dict(default=None, type='dict'),
     ))
     module = AnsibleModule(
         argument_spec=argument_spec,