provider/google Change default MySQL instance version to 5.6

[wendorf]

The Google Cloud SQL API defaults to 5.6, and 5.6 is the only version avaiable
to both first- and second-generation Cloud SQL instances.

[stack72]

LGTM! Thanks :)

% make testacc TEST=./builtin/providers/google TESTARGS='-run=TestAccGoogleSqlDatabaseInstance_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2016/10/28 01:05:49 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/google -v -run=TestAccGoogleSqlDatabaseInstance_ -timeout 120m
=== RUN   TestAccGoogleSqlDatabaseInstance_basic
--- PASS: TestAccGoogleSqlDatabaseInstance_basic (52.43s)
=== RUN   TestAccGoogleSqlDatabaseInstance_basic2
--- PASS: TestAccGoogleSqlDatabaseInstance_basic2 (51.26s)
=== RUN   TestAccGoogleSqlDatabaseInstance_settings_basic
--- PASS: TestAccGoogleSqlDatabaseInstance_settings_basic (31.81s)
=== RUN   TestAccGoogleSqlDatabaseInstance_settings_upgrade
--- PASS: TestAccGoogleSqlDatabaseInstance_settings_upgrade (57.63s)
=== RUN   TestAccGoogleSqlDatabaseInstance_settings_downgrade
--- PASS: TestAccGoogleSqlDatabaseInstance_settings_downgrade (34.97s)
=== RUN   TestAccGoogleSqlDatabaseInstance_authNets
--- PASS: TestAccGoogleSqlDatabaseInstance_authNets (48.82s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/google 276.937s

[ghost]

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