travis: Skip bluez and nis for now due to post-install script issues

Setting up bluez (4.98-2ubuntu7.2) ...
reload: Not running
invoke-rc.d: initscript dbus, action "force-reload" failed.
initctl: Unknown job: udev
reload: Unknown job: udev
invoke-rc.d: initscript udev, action "reload" failed.
start: Job failed to start
invoke-rc.d: initscript bluetooth, action "start" failed.
dpkg: error processing bluez (--configure):
 subprocess installed post-installation script returned error exit status 1

Setting up nis (3.17-32ubuntu4.1) ...
start: Job failed to start
invoke-rc.d: initscript ypbind, action "start" failed.
dpkg: error processing nis (--configure):
 subprocess installed post-installation script returned error exit status 1

Author: scop

.travis.yml

@@ -24,7 +24,8 @@ addons:
       - aspell
       - bc
       - bind9-host
-      - bluez
+      # post-installation script issues in Travis? (udev, dbus initscripts)
+      #- bluez
       - bridge-utils
       - bsdgames
       - cfengine2
@@ -109,7 +110,8 @@ addons:
       - nethogs
       - network-manager
       - nfs-common
-      - nis
+      # post-installation script issues in Travis? (ypbind initscripts)
+      #- nis
       - ntpdate
       - open-iscsi-utils
       - openswan