[cern] Fix CERN Grid Certification download path

Due to a new certificate, when magnum installs the CERN certificates (even when cern_enabled is false) fails because the replcaed certificate was removed and the file cannot be downloaded.

When we trying to update-ca-trust this operation fails and cluster fails to create. Using the new file path should be a quick fix for this

Change-Id: Ie3d1e0049d859828377963ef25d8e9dcb79a7dd5

magnum/drivers/common/templates/fragments/cern-setup.sh

@@ -7,7 +7,7 @@ ssh_cmd="ssh -F /srv/magnum/.ssh/config root@localhost"
 cd /etc/pki/ca-trust/source/anchors/
 
 BASE_URL=https://cafiles.cern.ch/cafiles/certificates/
-CERTS=( "CERN Root Certification Authority 2" "CERN Grid Certification Authority" "CERN Certification Authority" )
+CERTS=( "CERN Root Certification Authority 2" "CERN Grid Certification Authority(1)" "CERN Certification Authority" )
 
 for CERT in "${CERTS[@]}"
 do