kvm: do not configure libvirtd to listen on TCP port 16509

[weizhouapache]

This is the trillian setting for
apache/cloudstack-documentation#301
KVM: do not listen on TCP port when configure kvm host #301

[weizhouapache]

trillian test on jenkins :
http://sl-jenkins-master.sofia.shapeblue.com:8080/job/Reference_Trillian/4160/

[rohityadavcloud]

LGTM but some comments;
For firewall - both should be enabled? And, if listening on 16514 by default, the process may fail unless ssl/tls certs are configured.

[weizhouapache]

LGTM but some comments; For firewall - both should be enabled? And, if listening on 16514 by default, the process may fail unless ssl/tls certs are configured.

@rohityadavcloud
16509 are only used for vm migration if no ssl is provisioned. it is useless in recent cloudstack versions.
if we add kvm host on cloudtack UI or via api, it will automatically set up certificates and use TLS port 16514.

it is not needed any more to configure libvirt to listen on unsecure tcp port 16509.