[COMMON][CERTS] Use sh to onboard custom certs

Today, onboarding custom certificates relies on `bash`. But image used
for that doesn't have bash.
Therefore, we need to use `sh` in order to onboard the certs.

Issue-ID: OOM-2666
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: Ia8087bd9484a013ac76044681059f634a4e45eb8
diff --git a/kubernetes/common/certInitializer/templates/_certInitializer.yaml b/kubernetes/common/certInitializer/templates/_certInitializer.yaml
index c1459bf..5a8e84c 100644
--- a/kubernetes/common/certInitializer/templates/_certInitializer.yaml
+++ b/kubernetes/common/certInitializer/templates/_certInitializer.yaml
@@ -121,7 +121,7 @@
   securityContext:
     runAsUser: 0
   command:
-    - /bin/bash
+    - /bin/sh
     - -c
     - /root/import-custom-certs.sh
   env: