Fix Quagga permissions that prevent from writing configurations inside vtysh

[tcaiazzi]

We found that some permissions for images that uses Quagga are not set correctly. This prevents from writing a configuration file directly from vtysh using the write command, leading to the following error:

root@r2:/# vtysh
% Command incomplete.

Hello, this is Quagga (version 1.2.4).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

zebra# write
Building Configuration...
Can't open configuration file /etc/quagga/zebra.conf.LoGxRJ.
[OK]

This happens since Quagga tries to write the configuration on a temporary file (/etc/quagga/zebra.conf.LoGxRJ) that is created with the wrong permission.

To fix this issue we need to add change following permission to the Quagga directory (in DockerMachine and KubernetesMachine classes) from:

chown quagga:quagga /etc/quagga/*

To:

chown --recursive quagga:quagga /etc/quagga/

In this way the quagga user owns the /etc/quagga directory, allowing the writing of the temporary configuration file.