Only prepareForNewSession() when receiving a new IntegrationConfig
Only prepareForNewSession() when receiving a new IntegrationConfig

Otherwise it can be assumed that another application framework has not
started off the request, so nothing has mucked up the interpreter's session
machinery, so this step is unnecessary.

PrepareForNewSession() is incompatible with the early session examination
in D7's drupal_curator.php entrypoint.

curator-wik/curator,curator-wik/curator