Adapt tests for faster security config setup

Signed-off-by: Jens <jens.schmidt@eliatra.com>

opensearch-operator/pkg/reconcilers/securityconfig_test.go

@@ -295,7 +295,7 @@ echo 'Waiting to connect to the cluster'; sleep 10;
 done;count=0;
 until $ADMIN -cacert /certs/ca.crt -cert /certs/tls.crt -key /certs/tls.key -cd /usr/share/opensearch/config/opensearch-security -icl -nhnv -h no-securityconfig-tls-configured.no-securityconfig-tls-configured.svc.cluster.local -p 9200 || (( count++ >= 20 ));
 do
-sleep 20;
+sleep 10;
 done;`
 
 			Expect(createdJob.Spec.Template.Spec.Containers[0].Args[0]).To(Equal(cmdArg))