BigQuery: Adding support for schema autodetection

[gene-telligent]

This has been exposed through the protobuf API already; I just coded in a method to access it through the Java SDK.

See: https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.load.autodetect

[coveralls]

Coverage increased (+0.01%) to 81.106% when pulling 1ba92ed on telligent-data:feature/bq-schema-autodetect into a599972 on GoogleCloudPlatform:master.

[garrettjonesgoogle]

@tswast could you take a look?

[tswast]

Excellent!

Thanks for adding support for this feature. It's much appreciated.

[tswast]

@garrettjonesgoogle Is there an @beta annotation we should be adding to these features?

[garrettjonesgoogle]

@tswast I don't think we've been putting annotations on methods to match the support level of the underlying API. It gets tricky when the support level of the underlying API changes, because then we might have to keep revising the annotations in the client library to match.

The tag we have been using for features that might change in the client library is @ExperimentalApi (defined in protobuf).

[gene-telligent]

Hi all,

I've rebased the commit with the latest from master (waiting on CI builds to complete now, but internal running of the tests raised no errors).

I didn't use @ExperimentalApi as it seems to be an annotation reserved for the SPI libraries.

[coveralls]

Changes Unknown when pulling e6660b8 on telligent-data:feature/bq-schema-autodetect into ** on GoogleCloudPlatform:master**.

[tswast]

@garrettjonesgoogle could you merge? I haven't been tracking when releases are happening. I don't want to step on the release process again.