Fix last use of assertDictContainsSubset

The method was deprecated in Python 3.2 [1]; and
no longer available in Python version 3.12 [2]

assertLessEqual [3] offers a decent alternative.
Much of this work was done in
I74276297d80cbd055a9347b0d595fe7c2d7742cc. One
last occurrence remained.

[1] https://docs.python.org/3/whatsnew/3.2.html#unittest
[2] https://docs.python.org/3/whatsnew/3.12.html#id3
[3] https://docs.python.org/3/library/unittest.html#unittest.TestCase.assertLessEqual

Change-Id: I2f32f9815196a4d627ce22b382cdcb1f49027a52
Closes-Bug: #2085467
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
1 file changed