Non-functional change: use plugin_author instead of hardcoded string.

plugin_author is currently defined as "Innobase Oy" so this change is
a no-op.

storage/innobase/handler/i_s.cc

@@ -1068,7 +1068,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_lock_waits =
 
 	/* plugin author (for SHOW PLUGINS) */
 	/* const char* */
-	STRUCT_FLD(author, "Innobase Oy"),
+	STRUCT_FLD(author, plugin_author),
 
 	/* general descriptive text (for SHOW PLUGINS) */
 	/* const char* */