JBIDE-14776 baseclass and interfaces initialization

JBoss Tools XML Editor doesn't initialize base class and interface fields
in new class dialog called out of Tree Editor tab. It happens because
mapping to template expects namespace and system location are separated
by one space. Test added to verify this case.

ModelUiPreferencesPageTest package fixed to org.jboss.tools.*.

Add support for JSF 2.1 faces-config.xml files