Rmove RESET MASTER from have_log_bin.inc because it can cause some

test to stall for slave_net_timeout and cause some test case fail

mysql-test/include/have_log_bin.inc:
  remove reset master, which can cause some test to stall for slave_net_timeout and cause some test case fail
mysql-test/r/mysqlbinlog_base64.result:
  update result
mysql-test/t/mysqlbinlog_base64.test:
  Add reset master to make sure binlog is clean when the test case start

mysql-test/include/have_log_bin.inc

 # ==== Purpose ====
 # 
-# Ensure that the server is running with binlogging on and reset the
-# binlog.
+# Ensure that the server is running with binlogging on
 #
 # ==== Usage ====
 #
@@ -10,5 +9,4 @@
 -- require r/have_log_bin.require
 disable_query_log;
 show variables like "log_bin";
-RESET MASTER;
 enable_query_log;

mysql-test/r/mysqlbinlog_base64.result

+reset master;
 create table t1 (a int);
 insert into t1 values (1);
 insert into t1 values (2);

mysql-test/t/mysqlbinlog_base64.test

 -- source include/have_binlog_format_row.inc
+#
+# Reset master to cleanup binlog
+#
+reset master;
+
 #
 #  Write different events to binlog
 #