tests: skip networking tests for minimal templates

Minimal templates don't have networking packages installed by default.

qubes/tests/integ/network.py

@@ -67,6 +67,10 @@ class VmNetworkingMixin(object):
         if self.template.startswith('whonix-'):
             self.skipTest("Test not supported here - Whonix uses its own "
                           "firewall settings")
+        if self.template.endswith('-minimal'):
+            self.skipTest(
+                "Test not supported here - minimal template don't have "
+                "networking packages by default")
         self.init_default_template(self.template)
         self.testnetvm = self.app.add_new_vm(qubes.vm.appvm.AppVM,
             name=self.make_vm_name('netvm1'),