Update expected/sequence_1.out.

The last three updates to the sequence regression test have all forgotten
to touch the alternate expected-output file.  Sigh.

Michael Paquier

Author: tglsfdc

src/test/regress/expected/sequence_1.out

@@ -163,6 +163,9 @@ SELECT nextval('sequence_test'::text);
       99
 (1 row)
 
+DISCARD SEQUENCES;
+SELECT currval('sequence_test'::regclass);
+ERROR:  currval of sequence "sequence_test" is not yet defined in this session
 DROP SEQUENCE sequence_test;
 -- renaming sequences
 CREATE SEQUENCE foo_seq;
@@ -341,6 +344,9 @@ SELECT lastval();
       99
 (1 row)
 
+DISCARD SEQUENCES;
+SELECT lastval();
+ERROR:  lastval is not yet defined in this session
 CREATE SEQUENCE seq2;
 SELECT nextval('seq2');
  nextval