Simplify how MBS is configured

This merges the configuration from conf/config.py to
module_build_service/config.py. This also greatly simplifies the logic
in `init_config`. Additionally, `init_config` is no longer aware of
Flask. This will allow us to eventually break up the configuration
between the API and the backend.

conf/config.py

@@ -1,80 +0,0 @@
-# -*- coding: utf-8 -*-
-# SPDX-License-Identifier: MIT
-from os import environ, path
-
-# FIXME: workaround for this moment till confdir, dbdir (installdir etc.) are
-# declared properly somewhere/somehow
-confdir = path.abspath(path.dirname(__file__))
-# use parent dir as dbdir else fallback to current dir
-dbdir = path.abspath(path.join(confdir, "..")) if confdir.endswith("conf") else confdir
-
-
-class BaseConfiguration(object):
-    DEBUG = False
-    # Make this random (used to generate session keys)
-    SECRET_KEY = "74d9e9f9cd40e66fc6c4c2e9987dce48df3ce98542529fd0"
-    SQLALCHEMY_DATABASE_URI = "sqlite:///{0}".format(path.join(dbdir, "module_build_service.db"))
-    SQLALCHEMY_TRACK_MODIFICATIONS = True
-    # Where we should run when running "manage.py run" directly.
-    HOST = "0.0.0.0"
-    PORT = 5000
-
-
-class TestConfiguration(BaseConfiguration):
-    LOG_LEVEL = "debug"
-    SQLALCHEMY_DATABASE_URI = environ.get(
-        "DATABASE_URI", "sqlite:///{0}".format(path.join(dbdir, "mbstest.db")))
-    DEBUG = True
-    MESSAGING = "in_memory"
-
-    # Global network-related values, in seconds
-    NET_TIMEOUT = 3
-    NET_RETRY_INTERVAL = 1
-    # SCM network-related values, in seconds
-    SCM_NET_TIMEOUT = 0.1
-    SCM_NET_RETRY_INTERVAL = 0.1
-
-    KOJI_CONFIG = "./conf/koji.conf"
-    KOJI_PROFILE = "staging"
-    SERVER_NAME = "localhost"
-
-    KOJI_REPOSITORY_URL = "https://kojipkgs.stg.fedoraproject.org/repos"
-    SCMURLS = ["https://src.stg.fedoraproject.org/modules/"]
-
-    ALLOWED_GROUPS_TO_IMPORT_MODULE = {"mbs-import-module"}
-
-    # Greenwave configuration
-    GREENWAVE_URL = "https://greenwave.example.local/api/v1.0/"
-    GREENWAVE_DECISION_CONTEXT = "test_dec_context"
-    GREENWAVE_SUBJECT_TYPE = "some-module"
-
-    STREAM_SUFFIXES = {r"^el\d+\.\d+\.\d+\.z$": 0.1}
-
-    # Ensures task.delay executes locally instead of scheduling a task to a queue.
-    CELERY_TASK_ALWAYS_EAGER = True
-
-
-class ProdConfiguration(BaseConfiguration):
-    pass
-
-
-class LocalBuildConfiguration(BaseConfiguration):
-    CACHE_DIR = "~/modulebuild/cache"
-    LOG_LEVEL = "debug"
-    MESSAGING = "in_memory"
-
-    ALLOW_CUSTOM_SCMURLS = True
-    RESOLVER = "mbs"
-    RPMS_ALLOW_REPOSITORY = True
-    MODULES_ALLOW_REPOSITORY = True
-
-    # Celery tasks will be executed locally for local builds
-    CELERY_TASK_ALWAYS_EAGER = True
-
-
-class OfflineLocalBuildConfiguration(LocalBuildConfiguration):
-    RESOLVER = "local"
-
-
-class DevConfiguration(LocalBuildConfiguration):
-    DEBUG = True