[POLICY] Remove bash shell

removal any GPL-3.0 and plus license
for detail, please see the below Issue-ID

Issue-ID: POLICY-2847
Change-Id: I491c0762c9dc494092cbc4c66fed4a2c7d0a9ab2
Signed-off-by: Taka Cho <takamune.cho@att.com>
diff --git a/kubernetes/policy/components/policy-drools-pdp/templates/statefulset.yaml b/kubernetes/policy/components/policy-drools-pdp/templates/statefulset.yaml
index bf6f200..7e9c6cf 100755
--- a/kubernetes/policy/components/policy-drools-pdp/templates/statefulset.yaml
+++ b/kubernetes/policy/components/policy-drools-pdp/templates/statefulset.yaml
@@ -73,7 +73,7 @@
         - name: {{ include "common.name" . }}
           image: {{ include "repositoryGenerator.repository" . }}/{{ .Values.image }}
           imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
-          command: ["bash","-c"]
+          command: ["sh","-c"]
           args: ["if [ -f {{ .Values.certInitializer.credsPath }}/.ci ]; then \
                   source {{ .Values.certInitializer.credsPath }}/.ci; fi;\
                   cp {{ .Values.certInitializer.credsPath }}/org.onap.policy.p12 ${POLICY_HOME}/etc/ssl/policy-keystore;\