cassandra: Update the rack information of the 2 new cassandra servers

Related to swh/infra/sysadm-environment#4801

data/common/cassandra.yaml

@@ -39,10 +39,12 @@ cassandra::nodes:
     instances:
       instance1:
         cluster_name: archive_production
+        rack: 30C11
   cassandra08.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
+        rack: 30C11
 
 cassandra::clusters:
   archive_production:

[Vincent Sellier]

diff origin/production/cassandra07.internal.softwareheritage.org current/cassandra07.internal.softwareheritage.org
*******************************************
  File[/etc/cassandra/instance1/cassandra-rackdc.properties] =>
   parameters =>
     content =>
      @@ -1,2 +1,2 @@
       dc=sesi_rocquencourt
      -rack=rack1
      +rack=30C11
*******************************************
  Profile::Cassandra::Instance[instance1] =>
   parameters =>
     config =>
       rack =>
        - rack1
        + 30C11
*******************************************
*** End octocatalog-diff on cassandra07.internal.softwareheritage.org