python-blazarclient ftbfs in focal

seen in a focal test rebuild:
https://launchpad.net/ubuntu/+archive/test-rebuild-20200810-focal/+build/19799671

======================================================================
FAIL: blazarclient.tests.v1.shell_commands.test_leases.CreateLeaseTestCase.test_args2body_start_now
blazarclient.tests.v1.shell_commands.test_leases.CreateLeaseTestCase.test_args2body_start_now
----------------------------------------------------------------------
testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/blazarclient/tests/v1/shell_commands/test_leases.py", line 221, in test_args2body_start_now
    self.assertDictEqual(self.cl.args2body(args), expected)
  File "/<<PKGBUILDDIR>>/blazarclient/v1/shell_commands/leases.py", line 211, in args2body
    raise exception.IncorrectLease
blazarclient.exception.IncorrectLease: The lease parameters are incorrect.

----------------------------------------------------------------------
Ran 53 tests in 1.732s

FAILED (failures=1, skipped=7)
make[1]: *** [debian/rules:16: override_dh_auto_test] Error 1