install netaddr for cobbler snippet

Change-Id: Ie413e077837ea17653255ed408708a104fb88f51

install/cobbler.sh

@@ -22,6 +22,12 @@ else
     find /usr/lib -name manage_bind.py |xargs  perl -pi.old -e 's/(\s+)(self\.logger\s+\= logger)/$1$2\n$1if self\.logger is None:\n$1    import clogger\n$1    self\.logger = clogger.Logger\(\)/'
 fi
 
+sudo pip install netaddr
+if [[ "$?" != "0" ]]; then
+    echo "failed to install pip packages"
+    exit 1
+fi
+
 sudo chkconfig cobblerd on
 
 # create backup dir

install/dependency.sh

@@ -33,6 +33,10 @@ if [[ "$?" != "0" ]]; then
 fi
 
 sudo pip install virtualenvwrapper
+if [[ "$?" != "0" ]]; then
+    echo "failed to install virtualenvwrapper"
+    exit 1
+fi
 
 sudo chkconfig httpd on
 sudo chkconfig squid on