Implement a drush command for update from upstream

Here is my attempt at workspace Drush commands. I created three: workspace-list, workspace-pointer-list, and workspace-replicate.

The testbot failures look unrelated to my patch.

@PapaGrande Thank you for the patch, but it doesn't apply.

Andreis-MBP:workspace andrei$ git apply --check < workspace-drush-commands-2872413-3.patch
error: invalid path './workspace.drush.inc'

Just recreated the patch.

Error when running drush wpl:

Andreis-MBP:workspace andrei$ drush wpl
InvalidArgumentException: Field remote_pointer is unknown. in /Users/andrei/Sites/drupal8dev/core/lib/Drupal/Core/Entity/ContentEntityBase.php:509                            [error]
Stack trace:
#0 /Users/andrei/Sites/drupal8dev/core/lib/Drupal/Core/Entity/ContentEntityBase.php(490): Drupal\Core\Entity\ContentEntityBase->getTranslatedField('remote_pointer',
'x-default')
#1 /Users/andrei/Sites/drupal8dev/modules/contrib/workspace/workspace.drush.inc(171): Drupal\Core\Entity\ContentEntityBase->get('remote_pointer')
#2 phar:///usr/local/bin/drush/includes/command.inc(422): drush_workspace_pointer_list()
#3 phar:///usr/local/bin/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array)
#4 phar:///usr/local/bin/drush/includes/command.inc(199): drush_command()
#5 phar:///usr/local/bin/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array)
#6 phar:///usr/local/bin/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#7 phar:///usr/local/bin/drush/includes/startup.inc(458): drush_main()
#8 phar:///usr/local/bin/drush/includes/startup.inc(365): drush_run_main(false, '/', 'Phar detected. ...')
#9 phar:///usr/local/bin/drush/drush(114): drush_startup(Array)
#10 /usr/local/bin/drush(10): require('phar:///usr/loc...')
#11 {main}

Access denied error:

Andreis-MBP:workspace andrei$ drush wr 1 2
Denied access to view workspace Stage                                                                                                                                         [error]
Drupal\multiversion\Workspace\WorkspaceAccessException: The user does not have permission to view that workspace. in                                                          [error]
Drupal\multiversion\Workspace\WorkspaceManager->setActiveWorkspace() (line 118 of
/Users/andrei/Sites/drupal8dev/modules/contrib/multiversion/src/Workspace/WorkspaceManager.php).
Denied access to view workspace Stage                                                                                                                                         [error]
Drupal\multiversion\Workspace\WorkspaceAccessException: The user does not have permission to view that workspace. in                                                          [error]
/Users/andrei/Sites/drupal8dev/modules/contrib/multiversion/src/Workspace/WorkspaceManager.php:118
Stack trace:
#0 /Users/andrei/Sites/drupal8dev/modules/contrib/replication/src/BulkDocs/BulkDocs.php(140):
Drupal\multiversion\Workspace\WorkspaceManager->setActiveWorkspace(Object(Drupal\multiversion\Entity\Workspace))
#1 /Users/andrei/Sites/drupal8dev/modules/contrib/workspace/src/InternalReplicator.php(156): Drupal\replication\BulkDocs\BulkDocs->save()
#2 /Users/andrei/Sites/drupal8dev/modules/contrib/workspace/src/ReplicatorManager.php(200):
Drupal\workspace\InternalReplicator->replicate(Object(Drupal\workspace\Entity\WorkspacePointer), Object(Drupal\workspace\Entity\WorkspacePointer),
Object(Drupal\replication\ReplicationTask\ReplicationTask))
#3 /Users/andrei/Sites/drupal8dev/modules/contrib/workspace/src/ReplicatorManager.php(110):
Drupal\workspace\ReplicatorManager->doReplication(Object(Drupal\workspace\Entity\WorkspacePointer), Object(Drupal\workspace\Entity\WorkspacePointer),
Object(Drupal\replication\ReplicationTask\ReplicationTask))
#4 /Users/andrei/Sites/drupal8dev/modules/contrib/workspace/workspace.drush.inc(213):
Drupal\workspace\ReplicatorManager->replicate(Object(Drupal\workspace\Entity\WorkspacePointer), Object(Drupal\workspace\Entity\WorkspacePointer))
#5 phar:///usr/local/bin/drush/includes/command.inc(422): drush_workspace_replicate('1', '2')
#6 phar:///usr/local/bin/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array)
#7 phar:///usr/local/bin/drush/includes/command.inc(199): drush_command('1', '2')
#8 phar:///usr/local/bin/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array)
#9 phar:///usr/local/bin/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#10 phar:///usr/local/bin/drush/includes/startup.inc(458): drush_main()
#11 phar:///usr/local/bin/drush/includes/startup.inc(365): drush_run_main(false, '/', 'Phar detected. ...')
#12 phar:///usr/local/bin/drush/drush(114): drush_startup(Array)
#13 /usr/local/bin/drush(10): require('phar:///usr/loc...')
#14 {main}