Always process DNS and DHCP settings in installer (#1630)

* Always process DNS and DHCP settings in installer

* Make sure dnsmasq config exists before modifying it

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

* Make sure the dnsmasq config directory exists

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

* Only remove the DHCP config if it exists (fixes tests, hopefully)

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

test/test_automated_install.py

@@ -59,6 +59,8 @@ def test_setupVars_saved_to_file(Pihole):
     TERM=xterm
     source /opt/pihole/basic-install.sh
     {}
+    mkdir -p /etc/dnsmasq.d
+    version_check_dnsmasq
     finalExports
     cat /etc/pihole/setupVars.conf
     '''.format(set_setup_vars))