MFC r348565: MFV r348553:
9681 ztest failure in spa_history_log_internal due to spa_rename()

illumos/illumos-gate@6aee0ad76969eb0027131b3a338f2d94ae86f728

Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Matthew Ahrens <mahrens@delphix.com>