MXS-1507: Test transaction limits

The test cases check that the size limit works and that following
transactions work.

maxscale-system-test/cnf/maxscale.cnf.template.mxs1507_trx_replay

@@ -18,6 +18,7 @@ servers=server1,server2,server3,server4
 user=maxskysql
 passwd=skysql
 transaction_replay=true
+transaction_replay_max_size=200
 
 [RW Split Listener]
 type=listener

maxscale-system-test/mxs1507_trx_replay.cpp

@@ -131,7 +131,46 @@ int main(int argc, char** argv)
                 bind(ok, "COMMIT"),
             },
         },
-
+        {
+            "Exceed transaction length limit",
+            {
+                bind(ok, "BEGIN"),
+                bind(ok, "SELECT 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'"),
+            },
+            {
+                bind(err, "SELECT 7"),
+                bind(err, "COMMIT"),
+            },
+        },
+        {
+            "Normal trx after hitting limit",
+            {
+                bind(ok, "BEGIN"),
+                bind(ok, "SELECT 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'"),
+            },
+            {
+                bind(err, "SELECT 7"),
+                bind(err, "COMMIT"),
+            },
+            {
+                bind(ok, "BEGIN"),
+                bind(ok, "SELECT 1"),
+                bind(ok, "SELECT 2"),
+                bind(ok, "COMMIT"),
+            }
+        },
     };
 
     // Create a table for testing