Travis: switch test case to timestamp, dropping the TZ.

The timezone is different in between my own machine and the test system,
just get rid of that discrepancy so that the test stop failing.

test/csv-parse-date.load

@@ -15,7 +15,7 @@ LOAD CSV
     $$ drop table if exists dateformat; $$,
     $$ create table dateformat (
         rownum smallint,
-        ts     timestamptz
+        ts     timestamp
        );
     $$;
 

test/regress/expected/csv-parse-date.out

@@ -1,3 +1,3 @@
-1	2014-10-02 00:33:12.123456+02
-2	2014-10-02 00:33:13.123456+02
-3	2014-10-02 00:33:14.123456+02
+1	2014-10-02 00:33:12.123456
+2	2014-10-02 00:33:13.123456
+3	2014-10-02 00:33:14.123456