Description of problem:
 Security-domain is always used as security type for configuration of XA datasource even if I choose Username + Password.

Version-Release number of selected component (if applicable):
 EAP 6.2.0.CR1

How reproducible:
 Always

Steps to Reproduce:
 1. Start gui intallation, go to Post-install screen using default values.
 2. Select to install JDBC & Datasource.
 3. Select eg. postgresql as driver vendor and enter some jar file so the installer will let you go Next.
 4. Choose Username + Password as Security Type and finish the installation.
 5. Check configuration files or installation logs

Actual results:
CLI command:
#2 ... --max-pool-size=20 --user-name=master --password="asdasd!1" ...

<security>
    <security-domain>master</security-domain>
</security>

Expected results:
CLI command:
#2 ... --max-pool-size=20 --security-domain=master ...

<security>
    <user-name>master</user-name>
    <password>asdasd!1</password>
</security>

Additional info:
 - Regression against EAP 6.2.0.ER7
 - both standalone and domain are affected