CORE-20708 Updating retry condition so we don't try to unwrap nginx f…

…ailures

testing/e2e-test-utilities/src/main/kotlin/net/corda/e2etest/utilities/config/ConfigTestUtils.kt

@@ -3,7 +3,6 @@ package net.corda.e2etest.utilities.config
 import com.fasterxml.jackson.databind.JsonNode
 import kong.unirest.UnirestException
 import net.corda.e2etest.utilities.ClusterInfo
-import net.corda.e2etest.utilities.ClusterReadinessChecker
 import net.corda.e2etest.utilities.DEFAULT_CLUSTER
 import net.corda.e2etest.utilities.assertWithRetryIgnoringExceptions
 import net.corda.e2etest.utilities.cluster
@@ -152,14 +151,15 @@ fun ClusterInfo.waitForConfigurationChange(
             }
         }
 
-        // check cluster is ready. No need to aggressively poll too much as its expected the cluster to be down for a number of seconds
-        ClusterReadinessChecker().assertIsReady(Duration.ofMinutes(2), Duration.ofMillis(1000))
-
         // Wait for the service to become available again and have the expected configuration value
         assertWithRetryIgnoringExceptions {
             timeout(timeout)
             command { getConfig(section) }
             condition {
+                if (it.code != OK.statusCode) {
+                    return@condition false
+                }
+
                 val bodyJSON = it.body.toJson()
                 it.code == OK.statusCode && bodyJSON["sourceConfig"] != null
                         && bodyJSON.sourceConfigNode()[key] != null && bodyJSON.sourceConfigNode()[key].toString() == value