[ROBOT] Adopt HVVES test case in order to work with strimzi kafka

Fix base 64 decode usage in alpine image

Signed-off-by: Krzysztof Kuzmicki <krzysztof.kuzmicki@nokia.com>
Issue-ID: DMAAP-1705
Change-Id: I5b4cccafabc714fecd8e35ec07ad2286052199cd
diff --git a/robot/resources/dcae/hvves.robot b/robot/resources/dcae/hvves.robot
index 04e7e5d..cb88b83 100644
--- a/robot/resources/dcae/hvves.robot
+++ b/robot/resources/dcae/hvves.robot
@@ -22,7 +22,7 @@
 ${TEST_TRUSTSTORE_PASS_PATH}      security.keys.trustStorePasswordFile: /dev/null
 ${TEST_CONFIG_YAML_PATH}          ${EXECDIR}/robot/assets/dcae/hvves_test_config.yaml
 ${GET_CM_NAME}                    kubectl -n onap get --no-headers cm -l app.kubernetes.io/name=dcae-hv-ves-collector -o custom-columns=NAME:.metadata.name | grep application-config-configmap
-${KAFKA_GET_PASSWORD}             kubectl -n onap get secret strimzi-kafka-admin -o jsonpath="{.data.password}" | base64 --decode
+${KAFKA_GET_PASSWORD}             kubectl -n onap get secret strimzi-kafka-admin -o jsonpath="{.data.password}" | base64 -d
 
 *** Keywords ***
 Check Message Router Api