GAX headers

[lukesneeringer]

This is a tracking meta-issue for adding the gccl header to the GAX side of each API client library:

Each PR should:

• Add the lib_name and lib_version keyword arguments to the GAPIC client.
• Bump the version of the client library to 0.23.0
• Bump the GAPIC dependency to 0.15.0

Completion List:

• Datastore (Putting this off.)
• Error Reporting (GAPIC Header Consistency: Error Reporting #3055)
• Logging (GAPIC Header Consistency: Logging #3054)
• PubSub (GAPIC Header Consistency: Pubsub #3052)
• Spanner (Add gccl metrics header to Spanner. #3045)
• Speech (Speech Client Library Header #3048)
• Vision (GAPIC Header Consistency: Vision #3050)

[bjwatson]

@lukesneeringer Logging and Datastore are most urgent to complete, since they're Beta already.

@dhermes What's the status of #2746? If we don't have the manual layer ported onto GAPIC, we're going to have to implement the full custom header (x-goog-api-client) in the manual layer.

[tseaver]

Datastore is still not GAPIC (although we've added the dependency).

$ git grep gapic datastore/
datastore/setup.py:    'gapic-google-cloud-datastore-v1 >= 0.14.0, < 0.15dev',

[tseaver]

@lukesneeringer has pubsub in work. I will tackle logging and error_reporting bits today.

Reprioritized: leaving this on to @lukesneeringer / @dhermes .

[dhermes]

#2746 was my next priority after this issue. Since @lukesneeringer is taking the GAPIC ones to the finish line I can work on that now?

[lukesneeringer]

Yeah.

Edit: Although I will probably want help getting the umbrella release across the finish line, which I assert can and should precede #2746 (datastore can be 0.23.1).

[bjwatson]

Thanks @dhermes!

[lukesneeringer]

@lukesneeringer Logging and Datastore are most urgent to complete, since they're Beta already.

@omaray told us the exact opposite on Datastore; that it was least urgent because it is not being tracked yet. Based on that, I was actually intending to let it wait until @dhermes did #2746.

[bjwatson]

Ok, I would go with what @omaray said. :)

[lukesneeringer]

All items complete except Datastore. Closing this issue and tracking Datastore separately.

[bjwatson]

Thanks @lukesneeringer, @dhermes, and @tseaver! Can you let me know when packages are published with these updates? I assume that will be sometime today, due to the RTD issues.