fix cpg demo for python #1693 (#1695)

### What's done:
* Added CLASSPATH env var to demo-cpg deployment

Author: icemachined

save-cloud-charts/save-cloud/templates/demo-cpg-deployment.yaml

@@ -29,6 +29,8 @@ spec:
             {{- include "spring-boot.common.env" (merge (dict "service" .Values.demo_cpg) .) | nindent 12 }}
             - name: JAVA_TOOL_OPTIONS
               value: -XX:ReservedCodeCacheSize=48M
+            - name: CLASSPATH
+              value: /workspace/BOOT-INF/lib/*:.
           volumeMounts:
             - {{ include "spring-boot.config-volume-mount" . | indent 14 | trim }}
           {{- include "spring-boot.management" .Values.demo_cpg | nindent 10 }}