MXS-1267: Fix tee filter test results

The tests should no longer expect client session creation to fail if the
branch session creation is not successful.

The main session is kept alive so that a failure in the branch session
does not cause a failure of the main session. The main session can be
considered more important as it is what the client will use. If the branch
session fails, the failure will be logged so no information is lost.

Also added a missing configuration file and removed some extra-verbose
output in a test script.

maxscale-system-test/cnf/maxscale.cnf.template.bug657

@@ -0,0 +1,97 @@
+[maxscale]
+threads=###threads###
+log_warning=1
+
+[MySQL Monitor]
+type=monitor
+module=mysqlmon
+###repl51###
+servers= server1, server2,server3  ,server4
+user=maxskysql
+passwd= skysql
+monitor_interval=1000
+
+[RW Split Router]
+type=service
+router= readwritesplit
+servers=server1,     server2,              server3,server4
+user=maxskysql
+passwd=skysql
+
+[Read Connection Router Slave]
+type=service
+router=readconnroute
+router_options= slave
+servers=server1,server2,server3,server4
+user=maxskysql
+passwd=skysql
+filters=TEE
+
+[Read Connection Router Master]
+type=service
+router=readconnroute
+router_options=master
+servers=server1,server2,server3,server4
+user=maxskysql
+passwd=skysql
+filters=TEE
+
+[TEE]
+type=filter
+module=tee
+service=RW Split Router
+
+[RW Split Listener]
+type=listener
+service=RW Split Router
+protocol=MySQLClient
+port=4006
+#socket=/tmp/rwsplit.sock
+
+[Read Connection Listener Slave]
+type=listener
+service=Read Connection Router Slave
+protocol=MySQLClient
+port=4009
+
+[Read Connection Listener Master]
+type=listener
+service=Read Connection Router Master
+protocol=MySQLClient
+port=4008
+
+[CLI]
+type=service
+router=cli
+
+[CLI Listener]
+type=listener
+service=CLI
+protocol=maxscaled
+
+socket=default
+
+[server1]
+type=server
+address=###node_server_IP_1###
+port=###node_server_port_1###
+protocol=MySQLBackend
+
+[server2]
+type=server
+address=###node_server_IP_2###
+port=###node_server_port_2###
+protocol=MySQLBackend
+
+[server3]
+type=server
+address=###node_server_IP_3###
+port=###node_server_port_3###
+protocol=MySQLBackend
+
+[server4]
+type=server
+address=###node_server_IP_4###
+port=###node_server_port_4###
+protocol=MySQLBackend
+