Pam713 upgrade

[carlmes]

Changes in this pull request:

• Removed the tweaked standalone.xml, which was giving headaches upgrade to a newer RHPAM version due to changes from JBoss EAP 7.3 > 7.4 in the last update. Instead the install script now uses jboss-cli to make all the property changes which should be future-proof
• Uses the new jboss-cli mechanism for adding users rather than add-users (thanks @diego Torres Fuerte for figuring out the bug in the docs!)
• Checks for a RHPAM supported Java version, to remove the headaches of unsupported old or very new versions
• Configuration elements are now contained inside platform independent jboss-cli script files in support folder:
• user_data.cli - for setting up the demo accounts and passwords
• data_folders.cli - for configuring where the .niogit, .m2 etc folders are located relative to JBoss target
• managed_kie.cli - for configuring a managed KIE + BC instance using the controller accounts