A simple properties based bootstrap provider
The PropertiesBootstrapProvider supports the following properties
org.jboss.osgi.framework.autoInstall - Bundles that need to be installed with the Framework automatically
org.jboss.osgi.framework.autoStart - Bundles that need to be started automatically
org.jboss.osgi.framework.extra - An URL to extra properties, which recursivly may conatin this property.
All other properties are passed on to configure the framework.