Fix functional tests for py3

Fix various things so the functional tests will work under python3:

- A hashlib.md5() can only be update()d with an encoded string in py3.
- There's no dict.iteritems(), change to dict.items() (which is already
  an iterator).
- Open temp files with 'w+' mode rather than the default 'w+b' (as an
  alternative to encoding all the write and expected-read payloads as
  bytes).
- (This is a weird one) Explicitly raise SkipTest from unittest (rather
  than unittest2, which is where cls.skipException landed). Not sure why
  this is busted, but this moves the ball.

Conflict/issue with raising SkipTest on this branch.

(cherry picked from commit f1d742f32adeb662a3fdf8fa3ef3bc391e71ed81)
(cherry picked from commit b866202f54afddca66a77cd989b082e193a96956)

Includes squash of:
Before writing object data to stdout, re-open it in binary mode

Otherwise, you can hit TypeErrors on Python3.

Closes-Bug: 1775482
(cherry picked from commit 415b48056d9d021e04ec972029040a89a6b13928)

Conflicts:
    openstackclient/tests/functional/identity/v3/common.py

NOTE(melwitt): The conflicts are due to the following changes not in
Queens:

  Id8377363f7a3248b45aeeba21d2acc02684a0305
  I7c44bbb60557378b66c5c43a7ba917f40dc2b633

Change-Id: Ic9b2b47848a600e87a3674289ae7ae8c3e091fee
(cherry picked from commit 47f0277208362a3224f8e587bbdd60dd5aebf846)

1 files changed, 3 insertions, 2 deletions

diff --git a/openstackclient/api/object_store_v1.py b/openstackclient/api/object_store_v1.py
index 31033525..d1e5dfaf 100644
--- a/openstackclient/api/object_store_v1.py
+++ b/openstackclient/api/object_store_v1.py
@@ -378,8 +378,9 @@ class APIv1(api.BaseAPI):
         )
         if response.status_code == 200:
             if file == '-':
-                for chunk in response.iter_content(64 * 1024):
-                    sys.stdout.write(chunk)
+                with os.fdopen(sys.stdout.fileno(), 'wb') as f:
+                    for chunk in response.iter_content(64 * 1024):
+                        f.write(chunk)
             else:
                 if not os.path.exists(os.path.dirname(file)):
                     if len(os.path.dirname(file)) > 0: