ci: Fix CI job for 3.7 by switching to beta version of kombu

Because, the fix for the kombu issue
celery/kombu#1600
in only available in beta.

Signed-off-by: Ferenc Géczi <ferenc.geczi@ibm.com>

.circleci/config.yml

@@ -109,7 +109,8 @@ jobs:
     working_directory: ~/repo
     steps:
       - checkout
-      - pip-install-deps
+      - pip-install-deps:
+          requirements: "tests/requirements-307.txt"
       - run:
           name: run tests
           environment:

tests/requirements-307.txt

@@ -0,0 +1,50 @@
+aiofiles>=0.5.0
+aiohttp>=3.7.4
+boto3>=1.17.74
+celery>=5.0.5
+# TODO: Remove this when the fix is available in non beta
+# We have to use a beta version of kombu on Python 3.7
+# because only that fixes "AttributeError: 'EntryPoints' object has no attribute 'get'"
+# that we have in the CI: https://app.circleci.com/pipelines/github/instana/python-sensor/1372/workflows/90878561-aada-49f8-8a1b-78562aa05aab/jobs/7478
+# the issue: https://github.com/celery/kombu/issues/1600
+# the PR: https://github.com/celery/kombu/pull/1601/files
+# the release notes: https://github.com/celery/kombu/releases/tag/v5.3.0b2
+kombu>=5.3.0b2
+
+coverage>=5.5
+Django>=3.2.10
+fastapi>=0.65.1
+flask>=1.1.4,<2.0.0
+grpcio>=1.37.1
+google-cloud-pubsub<=2.1.0
+google-cloud-storage>=1.24.0
+lxml>=4.6.3
+mock>=4.0.3
+moto>=1.3.16,<2.0
+mysqlclient>=2.0.3
+nose>=1.3.7
+PyMySQL[rsa]>=1.0.2
+psycopg2-binary>=2.8.6
+pika>=1.2.0
+
+# protobuf is pulled in and also `basictracer`, a core instana dependency
+# and also by google-cloud-storage
+# but also directly needed by tests/apps/grpc_server/stan_pb2.py
+# On 4.0.0 we currently get:
+# AttributeError: module 'google._upb._message' has no attribute 'Message'
+# TODO: Remove this when support for 4.0.0 is done
+protobuf<4.0.0
+
+pymongo>=3.11.4
+pyramid>=2.0
+pytest>=6.2.4
+pytest-celery
+redis>=3.5.3
+requests-mock
+responses<=0.17.0
+sanic==21.6.2
+sqlalchemy>=1.4.15
+spyne>=2.13.16
+tornado>=4.5.3,<6.0
+uvicorn>=0.13.4
+urllib3[secure]<1.27,>=1.26.5