TEST/MINOR: e2e: set maxconn value in configmaps

Running haproxy with no maxconn can lead to haproxy consuming all memory
available and crashing thus resulting in tests failures

Author: Mo3m3n

deploy/tests/e2e/config-snippet/config/configmap.yaml

@@ -9,6 +9,7 @@ data:
     unique-id-header X-Unique-ID
   syslog-server: |
     address: stdout, format: raw, facility:daemon
+  maxconn: "1000"
   server-slots: "4"
   timeout-client: 50s
   timeout-connect: 5s

deploy/tests/e2e/tls-auth/config/client-auth.yaml

@@ -9,6 +9,7 @@ data:
   client-ca: e2e-tests-tls-auth/client-ca
   syslog-server: |
     address: stdout, format: raw, facility:daemon
+  maxconn: "1000"
   server-slots: "4"
   timeout-client: 50s
   timeout-connect: 5s