Increase memory dedicated for Memcached from 64MB to 256MB

PROD-32800

Change-Id: I8e3fa7c675100ed9b5ec263ac00a773c521df9c1
diff --git a/tests/pillar/server.sls b/tests/pillar/server.sls
index 2bb65aa..be5c81d 100644
--- a/tests/pillar/server.sls
+++ b/tests/pillar/server.sls
@@ -1,7 +1,7 @@
 memcached:
   server:
     enabled: true
-    cache_size: 64
+    cache_size: 256
     slabsize: 2m
     threads: 1
     bind: