Ensure php::module::ini uses the parametrised package name

Fixes an issue where changing the `php_package_name` would cause `php::module::ini` to require a different (missing) package to the one setup by `php::module`
Merge pull request #5 from alanpearce/patch-1

Ensure php::module::ini uses the parametrised package name
Fix php::module::ini when ensure is absent