Fix gnupg metadata verification

It looks like a newer version of python2-gnupg now expects the gnupghome
folder to exist before any keys are imported (wereas the older version
presumably just created it if it was not there already).

plugins/pulp_deb/plugins/importers/sync.py

@@ -184,7 +184,10 @@ def verify_release_file(self, distribution):
         # check signature
         if not self.get_config().get_boolean(constants.CONFIG_REQUIRE_SIGNATURE, False):
             return
-        gpg = self.gnupg_factory(homedir=os.path.join(self.get_working_dir(), 'gpg-home'))
+        worker_gpg_homedir = os.path.join(self.get_working_dir(), 'gpg-home')
+        if not os.path.exists(worker_gpg_homedir):
+            os.mkdir(worker_gpg_homedir, 0o700)
+        gpg = self.gnupg_factory(homedir=worker_gpg_homedir)
         shared_gpg = self.gnupg_factory(homedir=os.path.join('/', 'var', 'lib', 'pulp', 'gpg-home'))
 
         if self.get_config().get(constants.CONFIG_GPG_KEYS):