Better error reporting in mysql-test-run (don't hide the important message

with 'head').
Test fix (this sync_with_master was nonsense).
Now all tests pass in 4.0 in autobuild.

mysql-test/mysql-test-run.sh

@@ -569,7 +569,9 @@ error () {
 }
 
 error_is () {
-    $CAT < $TIMEFILE | $SED -e 's/.* At line \(.*\)\: \(.*\)/   \>\> Error at line \1: \2<\</' | $HEAD -1
+    $ECHO "Errors are (from $TIMEFILE) :"
+    $CAT < $TIMEFILE
+    $ECHO "(the last line(s) may be the ones that caused the die() in mysqltest)"
 }
 
 prefix_to_8() {

mysql-test/t/rpl_rotate_logs.test

@@ -73,12 +73,9 @@ insert into t2 values(1234);
 
 #same value on the master
 connection master;
-save_master_pos;
 set insert_id=1234;
 insert into t2 values(NULL);
 connection slave;
-sync_with_master;
-
 wait_for_slave_to_stop;
 
 #restart slave skipping one event