alternator-test: add 2 tables fixture

For some tests, more than 1 table is needed, so another fixture
that provided two additional test tables is added.
Message-Id: <75ae9de5cc1bca19594db1f0bc03260f83459380.1557402320.git.sarna@scylladb.com>

alternator-test/conftest.py

@@ -88,3 +88,16 @@ def test_table(dynamodb):
     # we create a test_table fixture, we'll choose a different table name
     # anyway.
     table.delete()
+
+@pytest.fixture(scope="session")
+def test_2_tables(dynamodb):
+    tables = [create_test_table(dynamodb,
+        KeySchema=[ { 'AttributeName': 'p', 'KeyType': 'HASH' },
+                    { 'AttributeName': 'c', 'KeyType': 'RANGE' }
+        ],
+        AttributeDefinitions=[
+                    { 'AttributeName': 'p', 'AttributeType': 'S' },
+                    { 'AttributeName': 'c', 'AttributeType': 'S' },
+        ]) for _ in range(2)]
+    yield tables
+    [table.delete() for table in tables]