Update test_system_tables_lazy_load to cover both cases and make it run

tests/integration/test_system_tables_lazy_load/configs/config_lazy.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<yandex>
+    <system_tables_lazy_load>true</system_tables_lazy_load>
+</yandex>

tests/integration/test_system_tables_lazy_load/test.py

@@ -0,0 +1,32 @@
+import pytest
+from helpers.cluster import ClickHouseCluster
+
+cluster = ClickHouseCluster(__file__)
+node_default = cluster.add_instance('node_default')
+# main_configs is mandatory ,since system_tables_lazy_load will be read earlier then parsing of config_lazy.xml
+node_lazy = cluster.add_instance('node_lazy', config_dir='configs', main_configs=['configs/config_lazy.xml'])
+
+system_logs = [
+    # disabled by default
+    # ('system.part_log'),
+    # ('system.text_log'),
+
+    # enabled by default
+    ('system.query_log'),
+    ('system.query_thread_log'),
+    ('system.trace_log'),
+    ('system.metric_log'),
+]
+
+@pytest.fixture(scope='module')
+def start_cluster():
+    try:
+        cluster.start()
+        yield cluster
+    finally:
+        cluster.shutdown()
+
+@pytest.mark.parametrize('table', system_logs)
+def test_system_table(start_cluster, table):
+    node_default.query('SELECT * FROM {}'.format(table))
+    assert "Table {} doesn't exist".format(table) in node_lazy.query_and_get_error('SELECT * FROM {}'.format(table))

tests/integration/test_system_tables_non_lazy_load/configs/config_non_lazy.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0"?>
-<yandex>
-    <system_tables_lazy_load>false</system_tables_lazy_load>
-</yandex>

tests/integration/test_system_tables_non_lazy_load/test_system_tables_non_lazy_load.py

@@ -1,24 +0,0 @@
-import time
-import pytest
-import os
-
-from helpers.cluster import ClickHouseCluster
-
-cluster = ClickHouseCluster(__file__)
-node1 = cluster.add_instance('node1', config_dir="configs")
-
-@pytest.fixture(scope="module")
-def start_cluster():
-    try:
-        cluster.start()
-        yield cluster
-    finally:
-        cluster.shutdown()
-
-def test_system_tables_non_lazy_load(start_cluster):
-    assert node1.query_and_get_error("SELECT * FROM system.part_log") == ""
-    assert node1.query_and_get_error("SELECT * FROM system.query_log") == ""
-    assert node1.query_and_get_error("SELECT * FROM system.query_thread_log") == ""
-    assert node1.query_and_get_error("SELECT * FROM system.text_log") == ""
-    assert node1.query_and_get_error("SELECT * FROM system.trace_log") == ""
-    assert node1.query_and_get_error("SELECT * FROM system.metric_log") == ""