Merge tomcat changes to default configuration

Take changes to the tomcat6 default configuration and apply to tomcat7
configuration.  This was done by review of the diff between sovereign's
tomcat6 configuration and the default tomcat7 configuration.

roles/mailserver/files/etc_tomcat7_server.xml

@@ -69,7 +69,7 @@
          APR (HTTP/AJP) Connector: /docs/apr.html
          Define a non-SSL HTTP/1.1 Connector on port 8080
     -->
-    <Connector port="8080" protocol="HTTP/1.1"
+    <Connector address="127.0.0.1" port="8080" protocol="HTTP/1.1"
                connectionTimeout="20000"
                URIEncoding="UTF-8"
                redirectPort="8443" />