Added both the certificates to ${USER_INSTALL_ROOT}/etc/DummyServerTrustFile.jks
Added both the certificates to ${USER_INSTALL_ROOT}/java/jre/lib/security/cacerts ??
Example command
/opt/WebSphere/AppServer/java/jre/bin/keytool -import -file
http://www-128.ibm.com/developerworks/websphere/techjournal/0502_benantar/0502_benantar.html