Log Message:
databases/ruby-activerecord42: update to 4.2.10

## Rails 4.2.10 (September 27, 2017) ##

*   `Relation#joins` is no longer affected by the target model's
    `current_scope`, with the exception of `unscoped`.

    Fixes #29338.

    *Sean Griffin*

## Rails 4.2.9 (June 26, 2017) ##

*   Fix regression caused by `collection_singular_ids=` ignoring different \ 
primary key on relationship.

    *Nick Pezza*

*   Fix `rake db:schema:load` with subdirectories.

    *Ryuta Kamizono*

*   Fix `rake db:migrate:status` with subdirectories.

    *Ryuta Kamizono*

*   Fix regression of #1969 with SELECT aliases in HAVING clause.

    *Eugene Kenny*

*   Fix `wait_timeout` to configurable for mysql2 adapter.

    Fixes #26556.

    *Ryuta Kamizono*

*   Make `table_name=` reset current statement cache,
    so queries are not run against the previous table name.

    *namusyaka*