fix unit tests

Author: joao-r-reis

conn_test.go

@@ -195,6 +195,7 @@ func TestDNSLookupConnected(t *testing.T) {
 
 	cluster := NewCluster("cassandra1.invalid", srv.Address, "cassandra2.invalid")
 	cluster.Logger = log
+	cluster.LegacyLogLevel = LogLevelDebug
 	cluster.ProtoVersion = int(defaultProto)
 	cluster.disableControlConn = true
 
@@ -219,6 +220,7 @@ func TestDNSLookupError(t *testing.T) {
 
 	cluster := NewCluster("cassandra1.invalid", "cassandra2.invalid")
 	cluster.Logger = log
+	cluster.LegacyLogLevel = LogLevelDebug
 	cluster.ProtoVersion = int(defaultProto)
 	cluster.disableControlConn = true
 
@@ -251,6 +253,7 @@ func TestStartupTimeout(t *testing.T) {
 	startTime := time.Now()
 	cluster := NewCluster(srv.Address)
 	cluster.Logger = log
+	cluster.LegacyLogLevel = LogLevelDebug
 	cluster.ProtoVersion = int(defaultProto)
 	cluster.disableControlConn = true
 	// Set very long query connection timeout