Adding XML Entity Include in server.xml so that we can create ad-hoc GlobalNamingResources.  Some servers need DBCP (or other) resources, so also adding tomcat::server::resource and ::addDbcpResource.
declaring (including) tomcat::server::resource in tomcat module's init.pp, because the file in question must exist.
Updating Modulefile/metadata.json for new build.
Adding two new features: optionally turn on shared-loader in catalina.properties (which also creates CATALINA_BASE/shared/lib), and optionally setting up sessionCookiePath in the <Context> element of context.xml, to enable shared sessions.
Updating for this version; also, adding OS support metadata to metadata.json.