Fix Bash syntax error with multiple conditions on ES and Kibana

elasticsearch/config/load_settings.sh

@@ -11,7 +11,7 @@ else
   wazuh_url="${WAZUH_API_URL}"
 fi
 
-if [ ${ENABLED_XPACK} != "true" || "x${ELASTICSEARCH_USERNAME}" = "x" || "x${ELASTICSEARCH_PASSWORD}" = "x" ]; then
+if [[ ${ENABLED_XPACK} != "true" || "x${ELASTICSEARCH_USERNAME}" = "x" || "x${ELASTICSEARCH_PASSWORD}" = "x" ]]; then
   auth=""
 else
   auth="--user ${ELASTICSEARCH_USERNAME}:${ELASTICSEARCH_PASSWORD}"

kibana/config/entrypoint.sh

@@ -13,7 +13,7 @@ else
   el_url="${ELASTICSEARCH_URL}"
 fi
 
-if [ ${ENABLED_XPACK} != "true" || "x${ELASTICSEARCH_USERNAME}" = "x" || "x${ELASTICSEARCH_PASSWORD}" = "x" ]; then
+if [[ ${ENABLED_XPACK} != "true" || "x${ELASTICSEARCH_USERNAME}" = "x" || "x${ELASTICSEARCH_PASSWORD}" = "x" ]]; then
   auth=""
 else
   auth="--user ${ELASTICSEARCH_USERNAME}:${ELASTICSEARCH_PASSWORD}"