Ajumal

feat(Spanner): Add sample for add and drop database roles for Spanner

3

This PR creates a sample for Spanner database role add and drop.

feat(Spanner): Add read write retry sample

2

This PR create a sample for maxRetry option in runTransaction

fix: Add AllowDynamicProperties annotation in Service class

1

Resolves https://github.com/googleapis/google-api-php-client-services/issues/4106

feat!: [Spanner] Upgrade to V2

3

Spanner V2: Part 1: - [x] Replacing Connection object with `RequestHandler` [`Operation` class] - [x] Replacing Connection object with `RequestHandler` [`Database` class] - [x] Replacing Connection object with `RequestHandler` [`Session`...

Depends on https://github.com/googleapis/gax-php/pull/561