Update tests to use key_size=1024

https://cryptography.io/en/42.0.3/changelog/\#v3-3

cfy_manager/tests/test_certificates.py

@@ -21,7 +21,7 @@ def _mock_small_cert_size():
  In tests, we don't need to create large certs. Making the size small
  makes these tests faster by an order of magnitude.
  """
- with mock.patch('cfy_manager.utils.certificates.CERT_SIZE', 512):
+ with mock.patch('cfy_manager.utils.certificates.CERT_SIZE', 1024):
  yield
 
 
@@ -77,7 +77,7 @@ def ca_cert(tmpdir):
 
  key = rsa.generate_private_key(
  public_exponent=65537,
- key_size=512, # no need for a big key in tests
+ key_size=1024, # cryptography 42.0.3/changelog/3.3
  )
  key_password = 'key_password1'
 
@@ -289,7 +289,7 @@ def test_remove_key_encryption(tmpdir, ca_cert):
 
  key = rsa.generate_private_key(
  public_exponent=65537,
- key_size=512,
+ key_size=1024,
  )
  with open(source_key, 'wb') as key_file:
  key_pem = key.private_bytes(