remove other changes in sample plugin build.gradle

Signed-off-by: Craig Perkins <cwperx@amazon.com>

sample-extension-plugin/build.gradle

@@ -6,7 +6,6 @@
 apply plugin: 'opensearch.opensearchplugin'
 apply plugin: 'opensearch.testclusters'
 apply plugin: 'opensearch.java-rest-test'
-apply plugin: 'opensearch.pluginzip'
 
 import org.opensearch.gradle.test.RestIntegTestTask
 import org.opensearch.gradle.testclusters.StandaloneRestIntegTestTask
@@ -126,7 +125,6 @@ testClusters.integTest {
             debugPort += 1
         }
     }
-
     setting 'path.repo', repo.absolutePath
 }
 
@@ -296,3 +294,19 @@ run {
     }
     useCluster testClusters.integTest
 }
+
+// As of ES 7.7 the sample-extension-plugin is being added to the list of plugins for the testCluster during build before
+// the job-scheduler plugin is causing build failures.
+// The job-scheduler zip is added explicitly above but the sample-extension-plugin is added implicitly at some time during evaluation.
+// Will need to do a deep dive to find out exactly what task adds the sample-extension-plugin and add job-scheduler there but a temporary hack is to
+// reorder the plugins list after evaluation but prior to task execution when the plugins are installed.
+afterEvaluate {
+    testClusters.javaRestTest.nodes.each { node ->
+        def nodePlugins = node.plugins
+        def firstPlugin = nodePlugins.get(0)
+        if (firstPlugin.provider == project.bundlePlugin.archiveFile) {
+            nodePlugins.remove(0)
+            nodePlugins.add(firstPlugin)
+        }
+    }
+}