Remove httpchk option from haproxy listeners

Remove httpchk option from haproxy listeners

To make sure we don't use the ssl-hello-chk option set by the
puppet-haproxy module we used to redefine the listener options
for all listeners.

With this change a default for the options hash is provided to
the puppet class instead.

This change also configures use of tcpka only where wanted, as
documented by [1], removing it from the haproxy defaults section,
given it wasn't used anyway by the other listeners which were
indeed overriding options.

1. https://github.com/beekhof/osp-ha-deploy/blob/master/pcmk/lb.scenario

Change-Id: Ic8deb77533f561cea7ce7db1d20f6be5e2dc0d33