Add Loader argument to 'yaml.load' invocations as required by PyYAML 6.0.

Submitted upstream:

  https://github.com/ganeti/ganeti/pull/1668

diff --git a/qa/qa_utils.py b/qa/qa_utils.py
index da485df48..27428e685 100644
--- a/qa/qa_utils.py
+++ b/qa/qa_utils.py
@@ -450,7 +450,7 @@ def GetObjectInfo(infocmd):
   master = qa_config.GetMasterNode()
   cmdline = utils.ShellQuoteArgs(infocmd)
   info_out = GetCommandOutput(master.primary, cmdline)
-  return yaml.load(info_out)
+  return yaml.load(info_out, Loader=yaml.SafeLoader)
 
 
 def UploadFile(node, src):
diff --git a/test/py/ganeti.cli_unittest.py b/test/py/ganeti.cli_unittest.py
index 9cc980afa..242aac9fd 100755
--- a/test/py/ganeti.cli_unittest.py
+++ b/test/py/ganeti.cli_unittest.py
@@ -1141,14 +1141,15 @@ class TestFormatPolicyInfo(unittest.TestCase):
           self._RenameDictItem(minmax, key, keyparts[0])
     self.assertTrue(constants.IPOLICY_DTS in parsed)
     parsed[constants.IPOLICY_DTS] = yaml.load("[%s]" %
-                                              parsed[constants.IPOLICY_DTS])
+                                              parsed[constants.IPOLICY_DTS],
+                                              Loader=yaml.SafeLoader)
 
   @staticmethod
   def _PrintAndParsePolicy(custom, effective, iscluster):
     formatted = cli.FormatPolicyInfo(custom, effective, iscluster)
     buf = StringIO()
     cli._SerializeGenericInfo(buf, formatted, 0)
-    return yaml.load(buf.getvalue())
+    return yaml.load(buf.getvalue(), Loader=yaml.SafeLoader)
 
   def _PrintAndCheckParsed(self, policy):
     parsed = self._PrintAndParsePolicy(policy, NotImplemented, True)
'2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
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<input type='submit' value='search'/>
</form>
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<div class='path'>path: <a href='/guix/log/?id=2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509'>root</a>/<a href='/guix/log/gnu?id=2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509'>gnu</a>/<a href='/guix/log/gnu/services?id=2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509'>services</a>/<a href='/guix/log/gnu/services/hurd.scm?id=2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509'>hurd.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/hurd.scm?id=2853a4dd5eee7eedb1c19a5fd2d0f2ca468a4509&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-11-30 01:08:55 +0100'>2021-11-30</span></td><td><a href='/guix/commit/gnu/services/hurd.scm?id=892f1b7273d57b25940700877a02618fe826cc08'>services: Accept &lt;inferior-package&gt;s in lieu of &lt;package&gt;s.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-06-13 10:04:51 +0200'>2020-06-13</span></td><td><a href='/guix/commit/gnu/services/hurd.scm?id=7304cb0a23a11b68d98ee70d911adc7048900536'>services: hurd: Remove deprecated 'hurd-getty-service' wrapper.</a><span class='msg-avail'>...</span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2020-06-08 14:26:14 +0200'>2020-06-08</span></td><td><a href='/guix/commit/gnu/services/hurd.scm?id=7ccd471c71d650055e99cd02381bc8dcd86d5313'>services: Add `hurd-getty-service-type'.</a><span class='msg-avail'>...</span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2020-06-08 14:26:14 +0200'>2020-06-08</span></td><td><a href='/guix/commit/gnu/services/hurd.scm?id=f9c04580bf5462bb088f47ad8fc6c3136649cbd6'>services: Add `hurd-console-service-type'.</a><span class='msg-avail'>...</span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>