ipaclient_test: Fix Python2 decode use with Python3

This is a remain of the Python2 version and has been fixed.

Fixed: #86 (AttributeError: 'str' object has no attribute 'decode')

roles/ipaserver/library/ipaserver_test.py

@@ -469,12 +469,19 @@ def main():
 
     # validate zonemgr
     if options.zonemgr:
+        if six.PY3:
+            with redirect_stdout(ansible_log):
+                bindinstance.validate_zonemgr_str(options.zonemgr)
+        else:
             try:
                 # IDNA support requires unicode
                 encoding = getattr(sys.stdin, 'encoding', None)
                 if encoding is None:
                     encoding = 'utf-8'
+                if not isinstance(value, unicode):
                     value = options.zonemgr.decode(encoding)
+                else:
+                    value = options.zonemgr
                 with redirect_stdout(ansible_log):
                     bindinstance.validate_zonemgr_str(value)
             except ValueError as e: