tls_proxy: Make sure port is an integer
tls_proxy: Make sure port is an integer

The apache::vhost::port parameter no longer accepts a string value and
now an integer value is required. This change makes sure the port is
converted to an integer value even if a string value is passed.

Partial-Bug: #1988053
Change-Id: I52f099b5ab198c8cd02bbe73a4fe491b86c6d442

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo