Bump connection limits to handle websockets

Websockets mean we make more connections to apache. Bump the connection
limits to 4096 connections total as this appears to handle summit load.

Change-Id: I87b6d06b5b730bde48d60fcbd6c025de5581b672
diff --git a/files/apache-connection-tuning b/files/apache-connection-tuning
index 847fae1..158adb0 100644
--- a/files/apache-connection-tuning
+++ b/files/apache-connection-tuning
@@ -18,22 +18,22 @@
 # spare threads around to better handle thundering herds of users (eg at the
 # start of summit sessions).
 <IfModule mpm_worker_module>
-    ServerLimit          64
+    ServerLimit         128
     StartServers          3
     MinSpareThreads      96
     MaxSpareThreads     192
     ThreadLimit          64
     ThreadsPerChild      32
-    MaxClients         2048
+    MaxClients         4096
     MaxRequestsPerChild   0
 </IfModule>
 <IfModule mpm_event_module>
-    ServerLimit          64
+    ServerLimit         128
     StartServers          3
     MinSpareThreads      96
     MaxSpareThreads     192
     ThreadLimit          64
     ThreadsPerChild      32
-    MaxClients         2048
+    MaxClients         4096
     MaxRequestsPerChild   0
 </IfModule>