Adding Proxy support plus xsdFilesLocation property

Added 2 features to  take advantage of changes made to the EPP Client code (also Included in external)

1) Added support for specifying a proxy server in epptools for testing EPP on clients that do not have their IP address in the Neustar white lists.
2) Support in epptools for specifying the location of the epp xsd files so they no longer need to be external to the deployed WAR. 

##New properties examples:

epp-proxyhost=registration-stage.respectnetwork.net
epp-proxyport=8888
epp-useproxy=true

xsdFilesLocation=/usr/share/tomcat7/webapps/ROOT/WEB-INF/classes