Loosen high-level mech requirements

In particular, sasl names and descriptions can be empty for
some mechanisms (NTLM in particular); do not fail the test
suite because they are empty.

Signed-off-by: Alexander Scheel <[email protected]>

Author: cipherboy

gssapi/tests/test_high_level.py

@@ -385,13 +385,12 @@ def test_sasl_properties(self):
             s = str(mech)
             s.shouldnt_be_empty()
             s.should_be_a(str)
-            s.should_be(mech._saslname.mech_name.decode(encoding))
 
-            mech.sasl_name.shouldnt_be_empty()
-            mech.sasl_name.should_be_a(six.text_type)
+            if mech.sasl_name:
+                mech.sasl_name.should_be_a(six.text_type)
 
-            mech.description.shouldnt_be_empty()
-            mech.description.should_be_a(six.text_type)
+            if mech.description:
+                mech.description.should_be_a(six.text_type)
 
             cmp_mech = gssmechs.Mechanism.from_sasl_name(mech.sasl_name)
             str(cmp_mech).should_be(str(mech))