relax unit test for HHblits search

Probability values of hits in HHblits searches using tag v3.2.0 and
the current master branch differ. We therefore only check whether we
find the expected number of hits and check their score in the hope
that the HHblits scores stay consistent in future HHblits releases.

modules/bindings/tests/test_hhblits.py

@@ -268,15 +268,12 @@ class TestHHblitsBindings(unittest.TestCase):
         search_file = self.hh.Search("testfiles/testali.a3m",
                                      'testfiles/hhblitsdb/unittestdb')
 
-        with open(search_file) as tfh:
-          tlst = tfh.readlines()
-        with open("testfiles/test_two.hhr") as efh:
-          elst = efh.readlines()
-
-        self.assertEqual(len(elst), len(tlst))
-        for i in range(0, len(elst)):
-            if not elst[i].startswith(('Date', 'Command')):
-                self.assertEqual(elst[i], tlst[i])
+        with open(search_file) as f:
+              header, hits = hhblits.ParseHHblitsOutput(f)
+        self.assertEqual(len(hits), 4)
+        exp_scores = [199.3, 12.3, 11.5, 8.1]
+        for hit_idx in range(4):
+            self.assertAlmostEqual(hits[hit_idx].score, exp_scores[hit_idx])
 
     def testSearchNotWorking(self):
         query_seq = seq.CreateSequence('Test', 'VLSPADKTNVKAAWGKVGAHAGEYGAEA'+