webserver.pp

...
    $custom_fragment_proxy_pass = '
RewriteEngine on
RewriteMap lowercase int:tolower
RewriteRule ^ - [E=SERVER_NAME:${lowercase:%{SERVER_NAME}}]
ProxyPassInterpolateEnv On
BrowserMatch "MSIE [2-6]" \
                 nokeepalive ssl-unclean-shutdown \
                             downgrade-1.0 force-response-1.0
BrowserMatch "MSIE [17-9]" ssl-unclean-shutdown'

...

    apache::vhost { 'subdomain.mysite.com ssl':
      servername => 'subdomain.mysite.com',
      serveraliases    => ['*.subdomain.mysite.com',],
      docroot => '/var/www/ampsport.com',
      port       => '443',
      priority   => 21,
      ssl        => true,
      ssl_honorcipherorder => 'On',
      ssl_cipher => $ssl_cipher,
      rewrites => [
	      {
          rewrite_cond => ['%{HTTP_HOST} ^www\.(.*) [NC]'],
          rewrite_rule => ['^(.*) https://%1$1 [R=301,L]'],
        }
      ],
      proxy_pass => [
	      { 'path' => '/',
          'url' => 'http://127.0.0.1:9090/VirtualHostBase/https/${SERVER_NAME}:443/SUBDOMAIN/VirtualHostRoot/ interpolate',
        },
      ],
      custom_fragment => $custom_fragment_proxy_pass,
    }