🤖 I have created a release \*beep\* \*boop\*
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### Updating meta-information for bleeding-edge SNAPSHOT release.
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This PR was generated with [Release Please](https://.com/googleapis/release-please). See [documentation](https://.com/googleapis/release-please#release-please).

…to v6.8.0 (#1265)

* feat: support setting an async executor provider

* fix: set defaults in builder

…cies to v1.4.0 (#1269)

Updates the LCI samples to be accordingly to the spec. Instead of
printing out the processing units directly from the instance that is
created, another getInstance is done in order to retrieve the
information.

Increase the wait time for a `DatabaseNotFound` error, as it can take a little while before
Cloud Spanner actually sends that error for a `SELECT 1` query.

Also enable the `ResourceNotFound` tests on the emulator, as the emulator now includes
`ResourceInfo` in the returned errors.

Fixes #1272

…r to Database (#1271)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* feat(spanner): add leader_options to InstanceConfig and default_leader to Database

PiperOrigin-RevId: 382409094

Source-Author: Google APIs <[email protected]>
Source-Date: Wed Jun 30 16:30:14 2021 -0700
Source-Repo: googleapis/googleapis
Source-Sha: 2c6e4dd22260e34403b468cc6d19aa43a9c684ed
Source-Link: googleapis/googleapis@2c6e4dd

* feat: add support for tagging in Connection API

* fix: disallow statement tags for commit/rollback/run

* chore: cleanup after rebase

* test: add generated tests + cleanup

* build: add new methods to clirr

* fix: add default implementations for new methods

🤖 I have created a release \*beep\* \*boop\*
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## [6.9.0](https://www..com/googleapis/java-spanner/compare/v6.8.0...v6.9.0) (2021-07-05)


### Features

* add support for tagging to Connection API ([#623](https://www..com/googleapis/java-spanner/issues/623)) ([5722372](https://www..com/googleapis/java-spanner/commit/5722372b7869828e372dec06e80e5b0e7280af61))
* **spanner:** add leader_options to InstanceConfig and default_leader to Database ([#1271](https://www..com/googleapis/java-spanner/issues/1271)) ([f257671](https://www..com/googleapis/java-spanner/commit/f25767144344f0df67662f1b3ef662902384599a))
* support setting an async executor provider ([#1263](https://www..com/googleapis/java-spanner/issues/1263)) ([369c8a7](https://www..com/googleapis/java-spanner/commit/369c8a771ec48fa1476236f800b0e8eb5982a33c))


### Dependencies

* update dependency com.google.cloud:google-cloud-shared-dependencies to v1.4.0 ([#1269](https://www..com/googleapis/java-spanner/issues/1269)) ([025e162](https://www..com/googleapis/java-spanner/commit/025e162813d6321dabe49e32f00934f9ae334e24))
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