Fix entrypoint of Kubernetes deployment

The entrypoint of the Kubernetes deployment did not use the entrypoint
script and thus did not use the CA-certificates, failing when testing
a Gerrit server using SSL.

Change-Id: I03510df84045381e23a65f641f2dd1bb1724d67d

kubernetes/load-tester/load-tester.deployment.yaml

diff --git a/kubernetes/load-tester/load-tester.deployment.yaml b/kubernetes/load-tester/load-tester.deployment.yaml
index 351d836..8348666 100644
--- a/kubernetes/load-tester/load-tester.deployment.yaml
+++ b/kubernetes/load-tester/load-tester.deployment.yaml
@@ -22,7 +22,7 @@
         - -ce
         args:
         - |
-          python3 ./start_test.py \
+          ./start.sh \
             -c /var/config/test.yaml \
             -u $GERRIT_USER \
             -p $GERRIT_PWD