Expiration date issue: guest account

What steps will reproduce the problem?
1. Register or update a guest account 
2. Account expiration date (maximum 180 days)
3. if i don't touch the expiration date i get the error :
 %1% is required { 5100 ERROR_FIELD_REQUIRED (unable to read expiration date value: Unparseable date: "") }

What is the expected output? What do you see instead?

%1% is required { 5100 ERROR_FIELD_REQUIRED (unable to read expiration date 
value: Unparseable date: "") }

What version of PWM are you using?

1.7.0

What ldap directory and version are you using?

eDirectory 8.8.7

Please paste any error log messages below:

ERROR, servlet.GuestRegistrationServlet, {6b,test@test.nl} 5100 
ERROR_FIELD_REQUIRED (unable to read expiration date value: Unparseable date: 
"") [IP]

Original issue reported on code.google.com by ni...@idsme.com on 12 Feb 2014 at 2:20

wolfd / pwm

Expiration date issue: guest account #538