Minor update to allowed errors list in mysql-test's mtr_report.pl

mysql-test/lib/mtr_report.pl:
  Update 'allowed errors' list to match re-formatted InnoDB error message.

mysql-test/lib/mtr_report.pl

@@ -342,7 +342,7 @@ sub mtr_report_stats ($) {
 
                 # BUG#29807 - innodb_mysql.test: Cannot find table test/t2
                 #             from the internal data dictionary
-                /Cannot find table test\/bug29807 from the internal data dictionary/ or
+                /Cannot find or open table test\/bug29807 from/ or
 
                 # BUG#29839 - lowercase_table3.test: Cannot find table test/T1
                 #             from the internal data dictiona