Fix kitchen tests

 - Disable sudo for kitchen tests
 - No update grub on docker/lxc
 - Avoid changing hostname in docker based tests

Change-Id: Ic93ecc4680fb9a44388f494259de28ea9e8a0fc0
diff --git a/tests/pillar/network.sls b/tests/pillar/network.sls
index f862ed1..009228f 100644
--- a/tests/pillar/network.sls
+++ b/tests/pillar/network.sls
@@ -2,7 +2,7 @@
   system:
     enabled: true
     domain: ci.local
-    name: linux
+    name: linux.ci.local
   network:
     enabled: true
     hostname: linux