Fix onion_location test (expect v3 address)

FAILED TESTS        
-------
test_onion_location.py test_onion_location.Test.test_onion_location
SUITE-END | took 30s        
Using workspace for temporary data: "/home/sysrqb/tor-browser-bundle-testsuite/reports/r/tbb.nightly.2021.08.10/results-tor-browser-linux64-tbb-nightly.2021.08.10_en-US.tar.xz/onion_location_ws"
mozversion application_buildid: 20210810010101
mozversion application_display_name: Tor Browser
mozversion application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
mozversion application_name: Firefox
mozversion application_remotingname: firefox
mozversion application_vendor: Mozilla
mozversion application_version: 78.12.0
mozversion platform_buildid: 20210810010101
mozversion platform_version: 78.12.0
Application command: /home/sysrqb/tor-browser-bundle-testsuite/tmp/tqma2o0O7h/tor-browser_en-US/Browser/ff_wrapper -no-remote -marionette -profile /home/sysrqb/tor-browser-bundle-testsuite/reports/r/tbb.
nightly.2021.08.10/results-tor-browser-linux64-tbb-nightly.2021.08.10_en-US.tar.xz/onion_location_ws/tmpSbiB2k.profile.default
Profile path is /home/sysrqb/tor-browser-bundle-testsuite/reports/r/tbb.nightly.2021.08.10/results-tor-browser-linux64-tbb-nightly.2021.08.10_en-US.tar.xz/onion_location_ws/tmpSbiB2k.profile.default
Starting fixture servers
Fixture server listening on http://127.0.0.1:43955/
Fixture server listening on https://127.0.0.1:46883/
e10s is enabled
mozversion application_buildid: 20210810010101
mozversion application_display_name: Tor Browser
mozversion application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
mozversion application_name: Firefox
mozversion application_remotingname: firefox
mozversion application_vendor: Mozilla
mozversion application_version: 78.12.0
mozversion platform_buildid: 20210810010101
mozversion platform_version: 78.12.0
SUITE-START | Running 1 tests
TEST-START | ../../../../marionette/tor_browser_tests/test_onion_location.py Test.test_onion_location
TEST-UNEXPECTED-FAIL | ../../../../marionette/tor_browser_tests/test_onion_location.py Test.test_onion_location | AssertionError: u'http://2gzyxa5ihm7nsggfxnu52rck2vv4rvmdlkiu3zzui5du4xyclen53wid.onion/i
ndex.html' != 'http://expyuzz4wqqyqhjn.onion/index.html'
Traceback (most recent call last):
  File "/home/sysrqb/tor-browser-bundle-testsuite/virtualenv-marionette-5.0.0/local/lib/python2.7/site-packages/marionette_harness-5.0.0-py2.7.egg/marionette_harness/marionette_test/testcases.py", line 1
59, in run
    testMethod()
  File "/home/sysrqb/tor-browser-bundle-testsuite/marionette/tor_browser_tests/test_onion_location.py", line 94, in test_onion_location
    self.get_url(), 'http://expyuzz4wqqyqhjn.onion/index.html')
TEST-INFO took 31816ms