Downgrade packages similar to OSS v1.0.16

Update bq-driver to work without a dataset

For running management queries on
a bigquery instance, ie. create/delete
datasets, we need the bigquery driver
to work with connection-strings where we
don't provide the dataset.
This diff solves that with minimal
changes, to keep the fork not deviate too
much from the OSS driver.

Downgrade packages similar to OSS v1.0.16

Update driver to work without dataset

For running management queries on
a bigquery instance, ie. create/delete
datasets, we need the bigquery driver
to work with connection-strings where we
don't provide the dataset.
This diff solves that with minimal
changes, to keep the fork not deviate too
much from the OSS driver.