Update JaasAuthenticationBroker.java

[chris-joys]

Allow user use encrypt password to check entry detail info via web console

[mattrpav]

@chris-joys is there a JIRA for this change?

[jbonofre]

It would be great to provide some explanation about this change:

1. why using decrypt on properties to get the password. My understanding is that you are using encrypted password (instead of plain)
2. If you are using encrypted password, the JAAS plugin should be configured by a property to define if the password is encrypted or not, else I think it will break all users using plain password.