fix: increase number of cnpg_pooler_connections (#52)

in previous puppet installs, the puppetdb api service opens MANY
connections. we need to increase the number to greater than 300.

Reviewed-on: #52

apps/base/puppet/cnpg_pooler.yaml

@@ -10,8 +10,8 @@ spec:
   instances: 2
   pgbouncer:
     parameters:
-      default_pool_size: "20"
-      max_client_conn: "100"
+      default_pool_size: "100"
+      max_client_conn: "400"
     paused: false
     poolMode: session
   template: