Add prepareBwcTests

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

Author: cwperks

build.gradle

@@ -760,23 +760,24 @@ ext.resolvebwcZipFile = { pluginId ->
     }
 }
 
-List<Provider<RegularFile>> plugins = [
-        provider(new Callable<RegularFile>(){
-            @Override
-            RegularFile call() throws Exception {
-                return new RegularFile() {
-                    @Override
-                    File getAsFile() {
-                    	return fileTree(bwcFilePath + "anomaly-detection/" + project.version).getSingleFile()
-		    }
-                }
-            }
-        })
-    ]
+List<Provider<RegularFile>> plugins = []
+
+// Ensure the artifact for the current project version is available to be used for the bwc tests
+
+task prepareBwcTests {
+    dependsOn bundlePlugin
+    doLast {
+        plugins = [
+                provider(jobSchedulerFile),
+                project.getObjects().fileProperty().value(project.tasks.bundlePlugin.archiveFile)
+        ]
+    }
+}
 
 // Creates 2 test clusters with 3 nodes of the old version. 
 2.times {i -> 
     task "${baseName}#oldVersionClusterTask$i"(type: RestIntegTestTask) {
+        dependsOn 'prepareBwcTests'
         useCluster testClusters."${baseName}$i"
         filter {
             includeTestsMatching "org.opensearch.ad.bwc.*IT"