rpm: add custom ansible modules to rpm package

Add read_ini_file custom ansible module to rpm package.

You can test the rpm building process:

```
$ rpmbuild -bb dxs.spec 
```

Copy the rpm file generated to a fresh XO, install the package and runansible:

```
# yum localinstall package.rpm
# runansible
Running rpm provided playbooks ! 

PLAY [all] ******************************************************************** 
...

````