Ensure constant is not initialized twice
Ensure constant is not initialized twice

fixes #150

wvega/tomcat,yakara-ltd/tomcat,nickptrvc/tomcat,benetech-cookbooks/tomcat,opscode-cookbooks/tomcat,joshburt/tomcat,Lianping/tomcat,GannettDigital/chef-tomcat,joshburt/tomcat,joshburt/tomcat,gsaslis/tomcat,chef-cookbooks/tomcat,ankushgupta/tomcat,gsaslis/tomcat,jolcese/tomcat,ankushgupta/tomcat,Lianping/tomcat,yakara-ltd/tomcat,Lianping/tomcat,nickptrvc/tomcat,benetech-cookbooks/tomcat,nickptrvc/tomcat,jolcese/tomcat,chef-cookbooks/tomcat,chef-cookbooks/tomcat,jolcese/tomcat,wvega/tomcat,benetech-cookbooks/tomcat,bitmonk/chef-tomcat,GannettDigital/chef-tomcat,opscode-cookbooks/tomcat,wvega/tomcat,gsaslis/tomcat,opscode-cookbooks/tomcat,bitmonk/chef-tomcat,yakara-ltd/tomcat,GannettDigital/chef-tomcat,ankushgupta/tomcat,bitmonk/chef-tomcat