When Jenkins is running in FIPS mode (see JEP) Do not allow users to configure the bind password shorter than 14 characters

How to reproduce this 

1. Go to Manage Jenkins > Security > Security Realm and select Active directory

1. Click on Add domain

1. Introduce a password shorter than 14 characters

The output is:

1. You don't get any error message

1. You can save the configuration

1. You can test it without re-validating the TLS Configuration option

Here is a draft PR with a proposed fix