WFLY-1448 , for MultipleClientRemoteJndiTestCase and NestedRemoteContextTestCase, replace hardcoded 'localhost' by test.bind.address.

Use system property test.bind.address to replace hardcoded localhost in case Jenkins configuration change to use other address than localhost.

wildfly: https://issues.jboss.org/browse/WFLY-1448
original bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=907542