test: restore timeout after bootmenu unit test

In the bootmenu unit test the console timeout is set to 500 ms.
Other tests rely on the original timeout. Ensure that the original value
is restored.
Signed-off-by: NHeinrich Schuchardt <heinrich.schuchardt@canonical.com>

test/py/tests/test_bootmenu.py

@@ -11,36 +11,36 @@ def test_bootmenu(u_boot_console):
     u_boot_console -- U-Boot console
     """
 
-    u_boot_console.p.timeout = 500
-    u_boot_console.run_command('setenv bootmenu_default 1')
-    u_boot_console.run_command('setenv bootmenu_0 test 1=echo ok 1')
-    u_boot_console.run_command('setenv bootmenu_1 test 2=echo ok 2')
-    u_boot_console.run_command('setenv bootmenu_2 test 3=echo ok 3')
-    u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
-    for i in ('U-Boot Boot Menu', 'test 1', 'test 2', 'test 3', 'autoboot'):
-        u_boot_console.p.expect([i])
-    # Press enter key to execute default entry
-    response = u_boot_console.run_command(cmd='\x0d', wait_for_echo=False, send_nl=False)
-    assert 'ok 2' in response
-    u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
-    u_boot_console.p.expect(['autoboot'])
-    # Press up key to select prior entry followed by the enter key
-    response = u_boot_console.run_command(cmd='\x1b\x5b\x41\x0d', wait_for_echo=False,
-                                          send_nl=False)
-    assert 'ok 1' in response
-    u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
-    u_boot_console.p.expect(['autoboot'])
-    # Press down key to select next entry followed by the enter key
-    response = u_boot_console.run_command(cmd='\x1b\x5b\x42\x0d', wait_for_echo=False,
-                                          send_nl=False)
-    assert 'ok 3' in response
-    u_boot_console.run_command('bootmenu 2; echo rc:$?', wait_for_prompt=False)
-    u_boot_console.p.expect(['autoboot'])
-    # Press the escape key
-    response = u_boot_console.run_command(cmd='\x1b', wait_for_echo=False, send_nl=False)
-    assert 'ok' not in response
-    assert 'rc:0' in response
-    u_boot_console.run_command('setenv bootmenu_default')
-    u_boot_console.run_command('setenv bootmenu_0')
-    u_boot_console.run_command('setenv bootmenu_1')
-    u_boot_console.run_command('setenv bootmenu_2')
+    with u_boot_console.temporary_timeout(500):
+        u_boot_console.run_command('setenv bootmenu_default 1')
+        u_boot_console.run_command('setenv bootmenu_0 test 1=echo ok 1')
+        u_boot_console.run_command('setenv bootmenu_1 test 2=echo ok 2')
+        u_boot_console.run_command('setenv bootmenu_2 test 3=echo ok 3')
+        u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
+        for i in ('U-Boot Boot Menu', 'test 1', 'test 2', 'test 3', 'autoboot'):
+            u_boot_console.p.expect([i])
+        # Press enter key to execute default entry
+        response = u_boot_console.run_command(cmd='\x0d', wait_for_echo=False, send_nl=False)
+        assert 'ok 2' in response
+        u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
+        u_boot_console.p.expect(['autoboot'])
+        # Press up key to select prior entry followed by the enter key
+        response = u_boot_console.run_command(cmd='\x1b\x5b\x41\x0d', wait_for_echo=False,
+                                              send_nl=False)
+        assert 'ok 1' in response
+        u_boot_console.run_command('bootmenu 2', wait_for_prompt=False)
+        u_boot_console.p.expect(['autoboot'])
+        # Press down key to select next entry followed by the enter key
+        response = u_boot_console.run_command(cmd='\x1b\x5b\x42\x0d', wait_for_echo=False,
+                                              send_nl=False)
+        assert 'ok 3' in response
+        u_boot_console.run_command('bootmenu 2; echo rc:$?', wait_for_prompt=False)
+        u_boot_console.p.expect(['autoboot'])
+        # Press the escape key
+        response = u_boot_console.run_command(cmd='\x1b', wait_for_echo=False, send_nl=False)
+        assert 'ok' not in response
+        assert 'rc:0' in response
+        u_boot_console.run_command('setenv bootmenu_default')
+        u_boot_console.run_command('setenv bootmenu_0')
+        u_boot_console.run_command('setenv bootmenu_1')
+        u_boot_console.run_command('setenv bootmenu_2')