Try following. You have to give the path of the client repository. In the repository folder there has to be a folder named 'modules' and the rampart mar should be inside this folder.
ConfigurationContext ctx = ConfigurationContextFactory.createConfigurationContextFromFileSystem("path/to/client/repo", null);
SimpleServiceStub stub = new SimpleServiceStub(ctx, "http://sbswsvm1426ou:9091/axis2/services/SimpleService?wsdl");
I think you will get a new error message again. Something like "PKIX path building failed". If you get that you need to add the server certificate to your keystore and need to import it. You can do it like this
System.setProperty("javax.net.ssl.trustStore", "/path/to/server.jks");
System.setProperty("javax.net.ssl.trustStorePassword", "password");
You can read more on this here. http://wso2.com/library/3190/