user change to avoid conflicts with user 'test'

mysql-test/t/rpl_temporary.test:
  user change to avoid conflicts with user 'test'
  (to which test connect.test gives password "gambling", so depending
  on the order of the tests, 'test' has password '' or 'gambling':
  better to use an unknown user which will be directed to ''@localhost
  with password always '').

mysql-test/t/rpl_temporary.test

@@ -19,7 +19,9 @@ connection master;
 
 connect (con1,localhost,root,,);
 connect (con2,localhost,root,,);
-connect (con3,localhost,test,,);
+# user 'boo' does not exist, because we want to be ''@localhost or ''@127.0.0.1
+# (using user 'test' conflicts with what connect.test does). 
+connect (con3,localhost,boo,,);
 
 # We are going to use SET PSEUDO_THREAD_ID in this test;
 # check that it requires the SUPER privilege.