MXS-2609: Add master reconnection test case

The test case covers a few bugs that were fixed by the previous
commits. The first part of the test covers the case when master
reconnection fails while session command history is being executed. The
second part of the test makes sure exceeding the session command history
will prevent master reconnections from taking place.

maxscale-system-test/cnf/maxscale.cnf.template.mxs2609_history_replay

@@ -0,0 +1,27 @@
+[maxscale]
+threads=###threads###
+
+###server###
+
+[MySQL-Monitor]
+type=monitor
+module=mariadbmon
+servers=###server_line###
+user=maxskysql
+password=skysql
+monitor_interval=1000
+
+[RW-Split-Router]
+type=service
+router=readwritesplit
+servers=###server_line###
+user=maxskysql
+password=skysql
+transaction_replay=true
+master_accept_reads=true
+
+[RW-Split-Listener]
+type=listener
+service=RW-Split-Router
+protocol=MySQLClient
+port=4006