Revert PR 2336 and upgrade to google-gax>=0.14.1

[dhermes]

FYI @geigerj and @bjwatson

[daspecster]

Is GrcpRendezvous used somewhere else that would prevent the removal of that class from exceptions.py? (there are some pylint overrides around it's definition.)

[dhermes]

@daspecster I'm not sure what you're asking. You want the alias removed? Or you'd like the alias in another location? Are you up to speed on the discussion in #2156?

[tseaver]

LGTM

[daspecster]

@dhermes, yeah I was asking if the alias could be removed.

[tseaver]

Hmmm, we are still using the alias:

$ git grep GrpcRendezvous
oogle/cloud/bigtable/row_data.py:    :type response_iterator: :class:`~google.cloud.exceptions.GrpcRendezvous`
google/cloud/bigtable/table.py:        :rtype: :class:`~google.cloud.exceptions.GrpcRendezvous`
google/cloud/datastore/connection.py:from google.cloud.exceptions import GrpcRendezvous
google/cloud/datastore/connection.py:        except GrpcRendezvous as exc:
google/cloud/exceptions.py:GrpcRendezvous = _Rendezvous
system_tests/bigtable.py:    from google.cloud.exceptions import GrpcRendezvous
system_tests/bigtable.py:        retry = RetryErrors(GrpcRendezvous,
unit_tests/_testing.py:        from google.cloud.exceptions import GrpcRendezvous
unit_tests/_testing.py:        return GrpcRendezvous(exc_state, None, None, None)
unit_tests/datastore/test_connection.py:        from google.cloud.exceptions import GrpcRendezvous
unit_tests/datastore/test_connection.py:        exc = GrpcRendezvous(exc_state, None, None, None)
unit_tests/datastore/test_connection.py:        from google.cloud.exceptions import GrpcRendezvous
unit_tests/datastore/test_connection.py:        exc = GrpcRendezvous(exc_state, None, None, None)
unit_tests/datastore/test_connection.py:        self._commit_failure_helper(exc, GrpcRendezvous)

[daspecster]

Thanks @tseaver I should have grepped that.

Those would be candidates for this change as well right?

[tseaver]

datastore and bigtable don't use GAX.

[dhermes]

What @tseaver said. The alias is still "required" in the sense that we still need to catch a _Rendezvous in the Bigtable and Datastore implementations.