playground connector create-or-update with --validate is slow

[vdesabou]

playground connector create-or-update --connector splunk-sink --validate << EOF
{
     "connector.class": "com.splunk.kafka.connect.SplunkSinkConnector",
     "tasks.max": "1",
     "topics": "splunk-qs",
     "splunk.indexes": "main",
     "splunk.hec.uri": "http://splunk:8088",
     "_splunk.hec.token": "99582090-3ac3-4db1-9487-e17b17a05081",
     "_splunk.hec.token": "WRONG",
     "splunk.sourcetypes": "my_sourcetype",
     "value.converter": "org.apache.kafka.connect.storage.StringConverter",
     "splunk.validation.disable": "true"
}
EOF