Should close filter in RocksDBStoreTest as well (#6676)

Forgot to also close the filter in RocksDBStoreTest in time.

Reviewers: Bill Bejeck <bbejeck@gmail.com>

streams/src/test/java/org/apache/kafka/streams/state/internals/RocksDBStoreTest.java

@@ -67,6 +67,7 @@ public class RocksDBStoreTest {
 
     InternalMockProcessorContext context;
     RocksDBStore rocksDBStore;
+    private static BloomFilter filter;
 
     @Before
     public void setUp() {
@@ -78,6 +79,7 @@ public class RocksDBStoreTest {
             Serdes.String(),
             Serdes.String(),
             new StreamsConfig(props));
+        filter = new BloomFilter();
     }
 
     RocksDBStore getRocksDBStore() {
@@ -86,6 +88,7 @@ public class RocksDBStoreTest {
 
     @After
     public void tearDown() {
+        filter.close();
         rocksDBStore.close();
     }
 
@@ -495,7 +498,7 @@ public class RocksDBStoreTest {
             tableConfig.setBlockCacheSize(50 * 1024 * 1024L);
             tableConfig.setBlockSize(4096L);
             if (enableBloomFilters) {
-                tableConfig.setFilter(new BloomFilter());
+                tableConfig.setFilter(filter);
                 options.optimizeFiltersForHits();
                 bloomFiltersSet = true;
             } else {