Drop generated code and upgrade JAXB

[fyrbach]

There are commented jaxb2-maven-plugins like in openam-saml2-schema module:

wrenam/openam-schema/openam-saml2-schema/pom.xml

Lines 37 to 64 in f11ef81

	<!--
	<plugin>
	<groupId>org.codehaus.mojo</groupId>
	<artifactId>jaxb2-maven-plugin</artifactId>
	<executions>
	<execution>
	<id>xjc-saml2</id>
	<goals>
	<goal>xjc</goal>
	</goals>
	</execution>
	</executions>
	<configuration>
	<extension>true</extension>
	<schemaFiles>
	entity-config-schema.xsd,
	saml-schema-assertion-2.0.xsd,
	saml-schema-metadata-2.0.xsd,
	schema.xsd,
	sstc-saml-metadata-ext-query.xsd,
	sstc-saml-metadata-x509-query.xsd,
	sstc-metadata-attr.xsd,
	sstc-saml-attribute-ext.xsd,
	sstc-saml-idp-discovery.xsd
	</schemaFiles>
	</configuration>
	</plugin>
	-->

And the repository contains generated code. E.g.:

wrenam/openam-schema/openam-saml2-schema/src/main/java/com/sun/identity/saml2/jaxb/assertion/impl/runtime/SAXUnmarshallerHandlerImpl.java

Lines 1 to 8 in f11ef81

	//
	// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v1.0.6-b27-fcs
	// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
	// Any modifications to this file will be lost upon recompilation of the source schema.
	// Generated on: 2012.06.11 at 10:34:07 AM PDT
	//
	package com.sun.identity.saml2.jaxb.assertion.impl.runtime;

The goals of this issue are:

• verify and evaluate possibility of dropping the generated code
• upgrade JAXB (and drop JAXB1)