[PLUGIN] Don't use atomic move when installing plugin

the extract location might be on a different filesystem where
atomic move won't work. Yet this operation is not critical in terms
of visibility so there is no need to do this.

src/main/java/org/elasticsearch/plugins/PluginManager.java

@@ -243,7 +243,7 @@ public class PluginManager {
             if (Files.exists(toLocation)) {
                 IOUtils.rm(toLocation);
             }
-            Files.move(binFile, toLocation, StandardCopyOption.ATOMIC_MOVE);
+            Files.move(binFile, toLocation);
             if (Files.getFileStore(toLocation).supportsFileAttributeView(PosixFileAttributeView.class)) {
                 final Set<PosixFilePermission> perms = new HashSet<>();
                 perms.add(PosixFilePermission.OWNER_EXECUTE);