S allius/issue398 (#406)

* setup logger for hypercorn and dashboard

* use logger.ini to setup dashboard logger

* workaround: restore the hypercorn logger config

- quart/hyercorn overwrites the logger config.
  as a workaround we restore the config at the
  beginning of a request

* fix the hypercorn log handler only once

* change proxy into a ASGI application

- move Quart init from server.py into app.py
- create Server class for config and loggin setup
- restore hypercorn logging configuration after
  start of Quart/Hypercorn

* move get_log_level into Server class

* define config in test_emu_init_close

* remove Web() instance from the testcase

- with importing app.py The blueprint Web() will
  automatically created and a second call in test-
  cases must avoided

* add unit tests

* move code from app.py into server.py

* test the init_logging_system() method

* add HypercornLogHndl tests

* fix deprecated pytest async warning

- Cleanup pending async tasks
- fix deprecated warning about event_loop

* add unit test for error handling in build_config()

* coverage: ignore quart template files

* check print output in test_save_and_restore

* update changelog

app/tests/conftest.py

@@ -0,0 +1,20 @@
+import pytest_asyncio
+import asyncio
+
+
+@pytest_asyncio.fixture
+async def my_loop():
+    event_loop = asyncio.get_running_loop()
+    yield event_loop                     
+
+    # Collect all tasks and cancel those that are not 'done'.  
+    tasks = asyncio.all_tasks(event_loop)
+    tasks = [t for t in tasks if not t.done()]
+    for task in tasks:
+        task.cancel()
+
+    # Wait for all tasks to complete, ignoring any CancelledErrors                                  
+    try:
+        await asyncio.wait(tasks)
+    except asyncio.exceptions.CancelledError:
+        pass