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/
diff --git a/test/py/tests/test_log.py b/test/py/tests/test_log.py
index 7980867..292f5b3 100644
--- a/test/py/tests/test_log.py
+++ b/test/py/tests/test_log.py
@@ -11,7 +11,7 @@
 import pytest
 
 @pytest.mark.buildconfigspec('cmd_log')
-def test_log_format(u_boot_console):
+def test_log_format(ubman):
     """Test the 'log format' and 'log rec' commands"""
     def run_with_format(fmt, expected_output):
         """Set up the log format and then write a log record
@@ -25,9 +25,9 @@
         output = cons.run_command('log rec arch notice file.c 123 func msg')
         assert output == expected_output
 
-    cons = u_boot_console
+    cons = ubman
     with cons.log.section('format'):
-        pad = int(u_boot_console.config.buildconfig.get('config_logf_func_pad'))
+        pad = int(ubman.config.buildconfig.get('config_logf_func_pad'))
         padding = ' ' * (pad - len('func'))
 
         run_with_format('all', f'NOTICE.arch,file.c:123-{padding}func() msg')
@@ -42,10 +42,10 @@
 
 @pytest.mark.buildconfigspec('debug_uart')
 @pytest.mark.boardspec('sandbox')
-def test_log_dropped(u_boot_console):
+def test_log_dropped(ubman):
     """Test dropped 'log' message when debug_uart is activated"""
 
-    cons = u_boot_console
+    cons = ubman
     cons.restart_uboot()
     output = cons.get_spawn_output().replace('\r', '')
     assert (not 'debug: main' in output)