Update module name regex to allow dots within module name

Example:

```
salt -C 'I@roles:foreman_webfrontend' state.show_top --out=json        
Executing job with jid 20140921145536094482
-------------------------------------------

{
    "ipm1021.hosted.systems": {
        "prod": [
            "crypto.x509",
            "foreman.plugins",
            "tools",
            "foreman.webfrontend",
            "httpd",
            "git",
            "network.hosts",
            "keepalived",
            "salt.minion",
            "users",
            "file.mounts",
            "linux.modules",
            "foreman.compute",
            "network.resolver",
            "time",
            "network.interfaces",
            "zsh"
        ]
    }
}
```