Adding a new testcase for expired certs


Conflicts:
	src/test/java/org/apache/ws/security/message/SignatureCertTest.java
	ws-security-common/src/test/resources/keys/ca.db.index.attr.old
	ws-security-common/src/test/resources/keys/ca.db.index.old
	ws-security-common/src/test/resources/keys/ca.db.serial.old
	ws-security-dom/pom.xml
	ws-security-stax/pom.xml

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/branches/1_6_x-fixes@1593549 13f79535-47bb-0310-9956-ffa450edef68