[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7660/8267] selftest/cases/signing: ignore removal errors when cleaning temporary gpg directory

[Emmanuele Bassi <ebassi src gnome org>]

commit f44dfe63a49675e51a72ba271771c1c26650cb43
Author: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
Date:   Thu Sep 7 15:52:54 2017 -0500

    selftest/cases/signing: ignore removal errors when cleaning temporary gpg directory
    
    The high-level method tempfile.TemporaryDirectory give us no way to
    ignore erros on removal thus use tempfile.mkdtemp instead. Ignoring possible issues
    on removal is neccesary because it contains gpg sockets that are automatically removed
    by the system once the process terminates, otherwise the following log is observed:
    
      ..
      ..
      File "/usr/lib/python3.5/shutil.py", line 436, in _rmtree_safe_fd
        os.unlink(name, dir_fd=topfd)
      FileNotFoundError: [Errno 2] No such file or directory: 'S.gpg-agent.browser'
    
    [YOCTO #11821]
    
    (From OE-Core rev: 7e3a7cd2426feac757def81850dc44156cd0f33e)
    
    Signed-off-by: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/lib/oeqa/selftest/cases/signing.py |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/meta/lib/oeqa/selftest/cases/signing.py b/meta/lib/oeqa/selftest/cases/signing.py
index edb5f65..b3d1a82 100644
--- a/meta/lib/oeqa/selftest/cases/signing.py
+++ b/meta/lib/oeqa/selftest/cases/signing.py
@@ -22,14 +22,17 @@ class Signing(OESelftestTestCase):
         if not shutil.which("gpg"):
             raise AssertionError("This test needs GnuPG")
 
-        cls.gpg_home_dir = tempfile.TemporaryDirectory(prefix="oeqa-signing-")
-        cls.gpg_dir = cls.gpg_home_dir.name
+        cls.gpg_dir = tempfile.mkdtemp(prefix="oeqa-signing-")
 
         cls.pub_key_path = os.path.join(cls.testlayer_path, 'files', 'signing', "key.pub")
         cls.secret_key_path = os.path.join(cls.testlayer_path, 'files', 'signing', "key.secret")
 
         runCmd('gpg --batch --homedir %s --import %s %s' % (cls.gpg_dir, cls.pub_key_path, 
cls.secret_key_path))
 
+    @classmethod
+    def tearDownClass(cls):
+        shutil.rmtree(cls.gpg_dir, ignore_errors=True)
+
     @OETestID(1362)
     def test_signing_packages(self):
         """