Accepting request 677998 from home:jayvdb:branches:devel:languages:python

- Replace no-async.patch with three Python 3.7 patches merged upstream
  python37-1.patch, python37-2.patch & python37-3.patch
- Replace sed invocation with unpin-pytest.patch for clarity

OBS-URL: https://build.opensuse.org/request/show/677998
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-celery?expand=0&rev=114

python37-3.patch

@@ -0,0 +1,28 @@
+From 6ab775eb6b5643311af21557fa84d10ce605eb17 Mon Sep 17 00:00:00 2001
+From: Omer Katz <omer.drow@gmail.com>
+Date: Fri, 4 Jan 2019 07:12:10 +0200
+Subject: [PATCH] Avoid raising StopIterator in generators. (#5263)
+
+According to [PEP-479](https://www.python.org/dev/peps/pep-0479/) StopIteration should not be used any more to indicate the termination of a generator.
+Starting from Python 3.7 this behaviour is always enforced and a RuntimeError is raised instead.
+Instead of raising a StopIterator exception, we now never execute our yield statement.
+Since it is present Gen is still a generator but it will never yield any value.
+---
+ t/unit/worker/test_loops.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/t/unit/worker/test_loops.py b/t/unit/worker/test_loops.py
+index f86f730f16..d57b416e47 100644
+--- a/t/unit/worker/test_loops.py
++++ b/t/unit/worker/test_loops.py
+@@ -383,8 +383,8 @@ def test_poll_write_generator_stopped(self):
+         x = X(self.app)
+ 
+         def Gen():
+-            raise StopIteration()
+-            yield
++            if 0:
++                yield
+         gen = Gen()
+         x.hub.add_writer(6, gen)
+         x.hub.on_tick.add(x.close_then_error(Mock(name='tick'), 2))