[AMQP] ensure nssdb pw is set to undef if we don't use ssl
[AMQP] ensure nssdb pw is set to undef if we don't use ssl

CONFIG_AMQP_NSS_CERTDB_PW is set only if SSL is enabled

Change-Id: I6ae09b0a13869b8ac0adadf58937c4f0bdadb68b
Closes-Bug: rhbz#1232648

stackforge/packstack,stackforge/packstack,xbezdick/packstack,mahak/packstack,openstack/packstack,fr34k8/packstack,mahak/packstack,imcsk8/packstack,fr34k8/packstack,imcsk8/packstack,xbezdick/packstack,openstack/packstack,imcsk8/packstack,stackforge/packstack,mahak/packstack,openstack/packstack,fr34k8/packstack,xbezdick/packstack