Set explicit duplicatesStrategy for all Copy and Archive Gradle tasks (#1643)

Gradle 7.0 changed the default duplicates Strategy to error when duplicates for
a copy or archive operations are detected. This leads to the build to fail
as the elasticsearch hadoop project relied on ignoring duplicates. With this change
we set the duplicatesStrategy for every related task to EXCLUDE

Author: breskeby

build.gradle

@@ -8,6 +8,9 @@ defaultTasks 'build'
 
 allprojects {
     group = "org.elasticsearch"
+    tasks.withType(AbstractCopyTask) {
+      duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    }
 }
 
 // Simple utility task to help with downloading artifacts and jars