ceph-volume: tests: update coverage comments

Signed-off-by: Alfredo Deza <adeza@redhat.com>

src/ceph-volume/ceph_volume/tests/test_configuration.py

@@ -1,8 +1,8 @@
 import os
 try:
     from cStringIO import StringIO
-except ImportError:
-    from io import StringIO
+except ImportError: # pragma: no cover
+    from io import StringIO # pragma: no cover
 from textwrap import dedent
 import pytest
 from ceph_volume import configuration, exceptions

src/ceph-volume/ceph_volume/tests/test_decorators.py

@@ -9,11 +9,11 @@ class TestNeedsRoot(object):
         def func():
             return True
         monkeypatch.setattr(decorators.os, 'getuid', lambda: 0)
-        assert decorators.needs_root(func)()() is True
+        assert decorators.needs_root(func)() is True
 
     def test_is_not_root(self, monkeypatch):
         def func():
-            return True
+            return True # pragma: no cover
         monkeypatch.setattr(decorators.os, 'getuid', lambda: 20)
         with pytest.raises(exceptions.SuperUserError) as error:
             decorators.needs_root(func)()