Add possibility to global:maxconn option

  * Global maxconn is the maximum number of connections
  handled by the haproxy process.
  * Set default to 25000

Change-Id: Icf37fdb894b79322ff737080fc0376b24cd36ac8
Closes-Bug: PROD-23078 (PROD:23078)
diff --git a/tests/pillar/single_general_service.sls b/tests/pillar/single_general_service.sls
index 7281769..8480b03 100644
--- a/tests/pillar/single_general_service.sls
+++ b/tests/pillar/single_general_service.sls
@@ -5,6 +5,8 @@
     logging: syslog
     max_connections: 1024
     nbproc: 4
+    global:
+      maxconn: 99999
     cpu_map:
       1: 0
       2: 1