Fix password property name + Use default value just like the 'cassandra' job does + Remove unused property

Author: bgandon

jobs/cassandra-acceptance-tests/templates/config.json.erb

@@ -25,13 +25,12 @@ link('cassandra_seeds_list').instances.each do |instance|
 {
   "timeout_scale":                     <%= p('timeout_scale') %>,
   "cluster_name":                     "<%= link('cassandra_seeds_list').p('cluster_name') %>",
-  "cassandra_password":               "<%= link('cassandra_seeds_list').p('cass_pwd') %>",
+  "cassandra_password":               "<%= link('cassandra_seeds_list').p('cassandra_password') %>",
   "cassandra_native_transport_port":  "<%= link('cassandra_seeds_list').p('native_transport_port') %>",
   "cassandra_seeds":                   <%= seeds_array.to_json %>,   
   "cassandra_servers":                 <%= servers_array.to_json %>,
   "client_encryption.enabled" :   	   <%= link('cassandra_seeds_list').p('client_encryption.enabled') %>,
-  "validate_ssl_TF":              	   <%= link('cassandra_seeds_list').p('validate_ssl_TF') %>, 
-  "keyspace_replication_factor":       <%= link('cassandra_seeds_list').p('system_auth_keyspace_replication_factor') %>,
+  "keyspace_replication_factor":       <%= link('cassandra_seeds_list').p('system_auth_keyspace_replication_factor', link('cassandra_seeds_list').instances.count) %>,
   "replication_strategy":              "SimpleStrategy",
   "durable_write":                     true
 }