Add null check condition in placement deployment manifest

Checking log_config_append vaule is missing in deloyment template
for Placement.

Change-Id: I0f2a0ca7d26320d599fac69ee091ca34b455c481

placement/Chart.yaml

@@ -16,7 +16,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Placement
 name: placement
-version: 0.1.3
+version: 0.1.4
 home: https://docs.openstack.org/placement/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Placement/OpenStack_Project_Placement_vertical.png
 sources:

placement/templates/deployment.yaml

@@ -97,10 +97,12 @@ spec:
               mountPath: /etc/placement/placement.conf
               subPath: placement.conf
               readOnly: true
+            {{- if .Values.conf.placement.DEFAULT.log_config_append }}
             - name: placement-etc
               mountPath: {{ .Values.conf.placement.DEFAULT.log_config_append }}
               subPath: {{ base .Values.conf.placement.DEFAULT.log_config_append }}
               readOnly: true
+            {{- end }}
             - name: placement-etc
               mountPath: /etc/placement/policy.yaml
               subPath: policy.yaml