ZTS: enospc_002 path cleanup

Removing hard-coded path used in enospc_002

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: bunder2015 <omfgbunder@gmail.com>
Closes #7515

tests/zfs-tests/tests/functional/no_space/enospc_002_pos.ksh

@@ -47,9 +47,9 @@ log_mustnot_expect space zfs snapshot $TESTPOOL/$TESTFS@snap2
 log_mustnot_expect space zfs bookmark \
     $TESTPOOL/$TESTFS@snap $TESTPOOL/$TESTFS#bookmark
 
-log_must zfs send $TESTPOOL/$TESTFS@snap >/tmp/stream.$$
-log_mustnot_expect space zfs receive $TESTPOOL/$TESTFS/recvd </tmp/stream.$$
-log_must rm /tmp/stream.$$
+log_must zfs send $TESTPOOL/$TESTFS@snap > $TEST_BASE_DIR/stream.$$
+log_mustnot_expect space zfs receive $TESTPOOL/$TESTFS/recvd < $TEST_BASE_DIR/stream.$$
+log_must rm $TEST_BASE_DIR/stream.$$
 
 log_must zfs rename $TESTPOOL/$TESTFS@snap $TESTPOOL/$TESTFS@snap_newname
 log_must zfs rename $TESTPOOL/$TESTFS@snap_newname $TESTPOOL/$TESTFS@snap