Issue - 50374 dsdim posixgroup create fails with ERROR

Bug Description:
dsidm posixgroup create passes a wrong parameter to
_get_attributes.

Fix Description:
Fix the parameter name.

Fixes https://pagure.io/389-ds-base/issue/50374

Reviewed by: mreynolds (Thanks!)

src/lib389/lib389/cli_idm/posixgroup.py

@@ -39,7 +39,7 @@ def get_dn(inst, basedn, log, args):
     _generic_get_dn(inst, basedn, log.getChild('_generic_get_dn'), MANY, dn, args)
 
 def create(inst, basedn, log, args):
-    kwargs = _get_attributes(args.extra, MUST_ATTRIBUTES)
+    kwargs = _get_attributes(args, MUST_ATTRIBUTES)
     _generic_create(inst, basedn, log.getChild('_generic_create'), MANY, kwargs, args)
 
 def delete(inst, basedn, log, args):