ipaserver_test: Initialize value from options.zonemgr

In the test of options.zonemgr the value has been be checked uninitialized.

roles/ipaserver/library/ipaserver_test.py

@@ -797,6 +797,7 @@ def main():
                 encoding = getattr(sys.stdin, 'encoding', None)
                 if encoding is None:
                     encoding = 'utf-8'
+                value = options.zonemgr
                 if not isinstance(value, unicode):
                     value = options.zonemgr.decode(encoding)
                 else: