The tests expect a tablespace to exists, we let the tests create it

--- a/regress/sql/tablespace.sql
+++ b/regress/sql/tablespace.sql
@@ -6,6 +6,8 @@ SET client_min_messages = warning;
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
 
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
+
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
 -- If the query above failed you must create the 'testts' tablespace;
 
--- a/regress/expected/tablespace.out
+++ b/regress/expected/tablespace.out
@@ -4,6 +4,7 @@ SET client_min_messages = warning;
 --
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
  spcname 
 ---------
--- a/regress/expected/tablespace_1.out
+++ b/regress/expected/tablespace_1.out
@@ -4,6 +4,7 @@ SET client_min_messages = warning;
 --
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
  spcname 
 ---------
--- a/regress/expected/tablespace_2.out
+++ b/regress/expected/tablespace_2.out
@@ -4,6 +4,7 @@ SET client_min_messages = warning;
 --
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
  spcname 
 ---------
--- a/regress/expected/tablespace_3.out
+++ b/regress/expected/tablespace_3.out
@@ -4,6 +4,7 @@ SET client_min_messages = warning;
 --
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
  spcname 
 ---------
--- a/regress/expected/tablespace_4.out
+++ b/regress/expected/tablespace_4.out
@@ -4,6 +4,7 @@ SET client_min_messages = warning;
 --
 -- Note: in order to pass this test you must create a tablespace called 'testts'
 --
+CREATE TABLESPACE testts LOCATION '/tmp/pg-repack-tablespace';
 SELECT spcname FROM pg_tablespace WHERE spcname = 'testts';
  spcname 
 ---------
