Remove the expired key and opensuse repo after cobbler being installed

Remove the opensuse expired key and opensuse cobbler repo after
cobbler being installed. OSA deployment doesn't need it.

And fix a typo and a link of README.rst

Change-Id: I24f5d823806f039d879dd69762b2eac3a6005628

multi-node-aio/README.rst

@@ -94,7 +94,7 @@ Notes
 
 The cobbler and pre-seed setup has been implemented using some of the awesome work originally created by James Thorne.
   * cobbler installation post - https://thornelabs.net/2015/11/26/install-and-configure-cobbler-on-ubuntu-1404.html
-  * pre-seeds -- https://github.com/jameswthorne/preseeds-rpc
+  * pre-seeds -- https://github.com/jameswthorne/preseeds
 
 
 Options
@@ -136,7 +136,7 @@ Instruct the system do all of the cobbler setup:
 Instruct the system do all of the virsh network setup:
   ``SETUP_VIRSH_NET=${SETUP_VIRSH_NET:-true}``
 
-Instruct the system to run the OSA playbooks, if you want to deploy other OSA powered cloud, you can set it to false.:
+Instruct the system to run the OSA playbooks, if you want to deploy other OSA powered cloud, you can set it to false:
   ``RUN_OSA=${RUN_OSA:-true}``
 
 

multi-node-aio/functions.rc

@@ -228,3 +228,14 @@ echo -e "Run Time = ${REPORT_OUTPUT}"
 set -e
 }
 
+# Return 1 if the second argument is a substring of the first argument, otherwise return 0
+contains() {
+    string="$1"
+    substring="$2"
+    if test "${string#*$substring}" == "$string"
+    then
+        echo 0    # $substring is not in $string
+    else
+        echo 1    # $substring is in $string
+    fi
+}

multi-node-aio/setup-cobbler.sh

@@ -143,3 +143,11 @@ done
 # Restart XinetD
 service xinetd stop
 service xinetd start
+
+# Remove the expired key and opensuse repo, no need after the cobbler being set up.
+aptkey_mesg=$(apt-key list)
+if [[ $(contains "$aptkey_mesg" "expired") -gt 0 ]]; then
+    expired_key=$(echo "$aptkey_mesg" | awk /expired/'{print $ sub(".*\/", "")}')
+    apt-key del $expired_key
+    add-apt-repository --remove "deb http://download.opensuse.org/repositories/home:/libertas-ict:/cobbler26/xUbuntu_14.04/ ./"
+fi