Fix trailing comma that cause Fatal SyntaxErrors

Got the following errors

```
[2014-03-04T06:08:57+00:00] FATAL: SyntaxError: compile error
/tmp/vagrant-chef-1/chef-solo-1/cookbooks/tomcat/recipes/default.rb:30: syntax error, unexpected ')'
/tmp/vagrant-chef-1/chef-solo-1/cookbooks/tomcat/recipes/default.rb:39: syntax error, unexpected ')'
/tmp/vagrant-chef-1/chef-solo-1/cookbooks/tomcat/recipes/default.rb:201: syntax error, unexpected $end, expecting kEND
```

Resolved by this update