Allow to set more options

This patch unhardcode the following options:
collector:
  batch_size
  batch_timeout
notification:
  batch_size
  batch_timeout
  workload_partitioning

Drop unneded limition of rpc threads.

Change-Id: I04de4400eccd4af65f2ef66ff08e2b7a9f601809
Related-Prod: PROD-21194
diff --git a/tests/pillar/server_cluster.sls b/tests/pillar/server_cluster.sls
index 7a6c50d..6aec6f1 100644
--- a/tests/pillar/server_cluster.sls
+++ b/tests/pillar/server_cluster.sls
@@ -3,7 +3,7 @@
     debug: true
     region: RegionOne
     enabled: true
-    version: mitaka
+    version: pike
     cluster: true
     secret: password
     ttl: 86400
@@ -59,6 +59,9 @@
         enabled: true
         host: 127.0.0.4
         port: 8086
+    notification:
+      batch_timeout: 10
+      batch_size: 100
       policy:
         segregation: 'rule:context_is_admin'
         'telemetry:get_resource':