Fix file-split-ftp for new file creation

* Decrease polling timeout in the sample to 1 second to speed up tests

Author: artembilan

applications/file-split-ftp/src/main/java/org/springframework/integration/samples/filesplit/Application.java

@@ -68,7 +68,7 @@ public IntegrationFlow fromFile() {
 		return IntegrationFlow.from(
 						Files.inboundAdapter(new File("/tmp/in"))
 								.preventDuplicates(false)
-								.patternFilter("*.txt"), e -> e.poller(Pollers.fixedDelay(5000)
+								.patternFilter("*.txt"), e -> e.poller(Pollers.fixedDelay(1000)
 										.errorChannel("tfrErrors.input"))
 								.id("fileInboundChannelAdapter"))
 				.handle(Files.splitter(true, true))

applications/file-split-ftp/src/test/java/org/springframework/integration/samples/filesplit/ApplicationTests.java

@@ -132,6 +132,7 @@ public void testFailure() throws Exception {
 	 */
 	private MimeMessage runTest(boolean fail) throws Exception {
 		File in = new File("/tmp/in/", "foo");
+		in.createNewFile();
 		FileOutputStream fos = new FileOutputStream(in);
 		fos.write("*002,foo,bar\n*006,baz,qux\n*009,fiz,buz\n".getBytes());
 		fos.close();