Fix regression failures on 9.6 by adding expected/*_1.out files

[df7cb]

Close #171

[df7cb]

Fwiw, this fixes differences in the EXPLAIN output that 9.6 introduces. Example:

$ diff -u multicorn_planner_test.out multicorn_planner_test_1.out 
--- multicorn_planner_test.out  2016-09-27 09:51:11.000000000 +0200
+++ multicorn_planner_test_1.out    2017-10-22 18:41:48.734500176 +0200
@@ -17,7 +17,7 @@
 NOTICE:  [('test1', 'character varying'), ('test2', 'character varying')]
                               QUERY PLAN                              
 ----------------------------------------------------------------------
- Foreign Scan on testmulticorn  (cost=10.00..400.00 rows=20 width=20)
+ Foreign Scan on testmulticorn  (cost=10.00..400.00 rows=20 width=64)
 (1 row)

 explain select * from testmulticorn m1 inner join testmulticorn m2 on m1.test1 = m2.test1;
@@ -55,7 +55,7 @@
 NOTICE:  [('test1', 'character varying'), ('test2', 'character varying')]
                                     QUERY PLAN                                    
 ----------------------------------------------------------------------------------
- Foreign Scan on testmulticorn  (cost=10.00..200000000.00 rows=10000000 width=20)
+ Foreign Scan on testmulticorn  (cost=10.00..200000000.00 rows=10000000 width=64)
 (1 row)

 explain select * from testmulticorn m1 inner join testmulticorn m2 on m1.test1 = m2.test1;

[rdunklau]

Merged.