What's correct catalina_base path for Tomcat installed from the package?

I've the following manifest to configure Tomcat to use 8983 port instead:

include java
class { 'tomcat': install_from_source => false }

tomcat::instance {'default': package_name => 'tomcat7'} ->
  tomcat::service  {'default':
    use_jsvc => false, use_init => true, service_name => 'tomcat7'
  }->
  tomcat::config::server { 'tomcat7':
    catalina_base => '/usr/share/tomcat7',
    port          => 8983,
  }

However when run, I've got the following errors:

$ sudo puppet apply -vd tomcat-test.pp
debug: Augeas[server-/usr/share/tomcat7](provider=augeas): Augeas version 1.3.0 is installed
debug: Augeas[server-/usr/share/tomcat7](provider=augeas): sending command 'set' with params ["/files/usr/share/tomcat7/conf/server.xml/Server/#attribute/port", "8983"]
debug: Augeas[server-/usr/share/tomcat7](provider=augeas): Closed the augeas connection
err: /Stage[main]//Tomcat::Config::Server[tomcat7]/Augeas[server-/usr/share/tomcat7]: Could not evaluate: Save failed with return code false

Which indicates that Augeas is trying to modify the wrong file (/usr/share/tomcat7/conf/server.xml) which is in /etc/tomcat7.

At puppetlabs-tomcat GitHub we can read:

tomcat::config::server: Configures attributes for the Server element in $CATALINA_BASE/conf/server.xml.

$catalina_base Specifies the base directory for the Tomcat installation.

which suggest I should have conf dir in Tomcat base folder (CATALINA_BASE), but it isn't there, as all the configuration is in stored separately in /etc/tomcat7.

See: Tomcat documentation.

Is there any way that puppetlabs-tomcat module can somehow handle properly the default installed instance of Tomcat? Or I should create a symbolic link?