Intermedia commit before removing dns reflection classes

Conflicts:
	build/eclipse/classpath
	source/org/jivesoftware/smack/util/DNSUtil.java
	source/org/jivesoftware/smack/util/dns/DNSResolver.java
	source/org/jivesoftware/smack/util/dns/ReflectionDNSJava.java
	source/org/jivesoftware/smack/util/dns/ReflectionJavaxDNS.java
Added testcases for DNSUtil