Support reading entries without trailing '/'

Update RandomAccessJarFile entries when the name is specified without
a trailing '/'

spring-bootstrap-launcher/src/main/java/org/springframework/bootstrap/launcher/jar/RandomAccessJarFile.java

@@ -175,7 +175,11 @@ public class RandomAccessJarFile extends JarFile {
 
 	@Override
 	public ZipEntry getEntry(String name) {
-		return this.entries.get(name);
+		JarEntry entry = this.entries.get(name);
+		if (entry == null && name != null && !name.endsWith("/")) {
+			entry = this.entries.get(name + "/");
+		}
+		return entry;
 	}
 
 	@Override

spring-bootstrap-launcher/src/test/java/org/springframework/bootstrap/launcher/jar/RandomAccessJarFileTest.java

@@ -52,7 +52,7 @@ import org.springframework.bootstrap.launcher.data.RandomAccessDataFile;
 
 /**
  * Tests for {@link RandomAccessJarFile}.
- * 
+ *
  * @author Phillip Webb
  */
 public class RandomAccessJarFileTest {
@@ -300,6 +300,13 @@ public class RandomAccessJarFileTest {
 		assertThat(inputStream.read(), equalTo(-1));
 	}
 
+	@Test
+	public void getDirectoryInputStreamWithoutSlash() throws Exception {
+		InputStream inputStream = jarFile.getInputStream(jarFile.getEntry("d"));
+		assertThat(inputStream, notNullValue());
+		assertThat(inputStream.read(), equalTo(-1));
+	}
+
 	@Test
 	public void getFilteredJarFile() throws Exception {
 		RandomAccessJarFile filteredJarFile = jarFile