Avoid a NPE in CryptoFactory on a null Properties object


Conflicts:
	ws-security-common/src/main/java/org/apache/wss4j/common/crypto/CryptoFactory.java

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1453775 13f79535-47bb-0310-9956-ffa450edef68