WS-sec truststore/keystore urls should be obtained from the central security configuration

Anil Saldhana wrote on https://github.com/jbossas/jboss-as/pull/630 :

Ensure that the ws-sec truststore/keystore urls are obtained from the central security configuration.
Rely on the from https://docs.jboss.org/author/display/AS7/Security+subsystem+configuration

Pull req 630 was actually closed and later replaced by https://github.com/jbossas/jboss-as/pull/662