Improve code coverage.

h2/src/main/org/h2/store/fs/FileObjectDisk.java

@@ -46,7 +46,7 @@ public class FileObjectDisk extends RandomAccessFile implements FileObject {
     }
 
     public String getName() {
-        return name;
+        return name.replace('\\', '/');
     }
 
     public synchronized boolean tryLock() {

h2/src/main/org/h2/store/fs/FileObjectDiskChannel.java

@@ -42,7 +42,7 @@ public class FileObjectDiskChannel implements FileObject {
     }
 
     public String getName() {
-        return FileSystemDiskNio.PREFIX + name;
+        return FileSystemDiskNio.PREFIX + name.replace('\\', '/');
     }
 
     public long length() throws IOException {

h2/src/main/org/h2/store/fs/FileObjectDiskMapped.java

@@ -130,7 +130,7 @@ public class FileObjectDiskMapped implements FileObject {
     }
 
     public String getName() {
-        return FileSystemDiskNioMapped.PREFIX + name;
+        return FileSystemDiskNioMapped.PREFIX + name.replace('\\', '/');
     }
 
     public long length() throws IOException {