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/.kitchen.yml b/.kitchen.yml
index 2c11074..f3fc5b6 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -2,7 +2,7 @@
 driver:
   name: docker
   hostname: linux.ci.local
-  use_sudo: sudo
+  use_sudo: false
 
 provisioner:
   name: salt_solo