Use version_compare for versions comparison.

templates/tomcat-server.xml.j2

@@ -21,7 +21,7 @@
 {% else %}
 <Server port="{{ item.shutdown_port }}" shutdown="{{ tomcat_m_shutdown_pwd }}">
  {% endif %}
-{% if tomcat_version <= 7 %}
+{% if tomcat_version is version_compare('7', '<=') %}
   <Listener className="org.apache.catalina.core.JasperListener" />
 {% endif %}
   <!-- Prevent memory leaks due to use of particular java/javax APIs-->