test/py: Shorten u_boot_console

This fixture name is quite long and results in lots of verbose code.
We know this is U-Boot so the 'u_boot_' part is not necessary.

But it is also a bit of a misnomer, since it provides access to all the
information available to tests. It is not just the console.

It would be too confusing to use con as it would be confused with
config and it is probably too short.

So shorten it to 'ubman'.

Signed-off-by: Simon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/u-boot/CAFLszTgPa4aT_J9h9pqeTtLCVn4x2JvLWRcWRD8NaN3uoSAtyA@mail.gmail.com/

test/py/tests/test_fs/test_fs_fat.py

@@ -14,12 +14,12 @@ import re
 @pytest.mark.boardspec('sandbox')
 @pytest.mark.slow
 class TestFsFat(object):
-    def test_fs_fat1(self, u_boot_console, fs_obj_fat):
+    def test_fs_fat1(self, ubman, fs_obj_fat):
         """Test that `fstypes` prints a result which includes `sandbox`."""
         fs_type,fs_img = fs_obj_fat
-        with u_boot_console.log.section('Test Case 1 - fatinfo'):
+        with ubman.log.section('Test Case 1 - fatinfo'):
             # Test Case 1 - ls
-            output = u_boot_console.run_command_list([
+            output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
                 'fatinfo host 0:0'])
             assert(re.search('Filesystem: %s' % fs_type.upper(), ''.join(output)))