Revert to original test fixture size

Author: garydgregory

src/test/java/org/apache/commons/io/channels/FileChannelsTest.java

@@ -85,7 +85,7 @@ public void testContentEquals(
         final Path bigFile3 = Files.createTempFile(getClass().getSimpleName(), "-3.bin");
         try {
             // This length must match any restriction from the Surefire configuration.
-            final int newLength = 2_000_000;
+            final int newLength = 1_000_000;
             final byte[] bytes1 = new byte[newLength];
             final byte[] bytes2 = new byte[newLength];
             // Make sure bytes1 and bytes2 are different despite the shuffle