sepolgen: Close files after reading/writing in tests.

Signed-off-by: Robert Kuska <rkuska@redhat.com>

sepolgen/tests/test_audit.py

@@ -166,6 +166,7 @@ class TestAuditParser(unittest.TestCase):
         f = open("audit.txt")
         a = sepolgen.audit.AuditParser()
         a.parse_file(f)
+        f.close()
         self.assertEqual(len(a.avc_msgs), 21)
         self.assertEqual(len(a.compute_sid_msgs), 0)
         self.assertEqual(len(a.invalid_msgs), 0)

sepolgen/tests/test_interfaces.py

@@ -268,6 +268,7 @@ class TestInterfaceSet(unittest.TestCase):
         i2 = interfaces.InterfaceSet()
         f = open("output")
         i2.from_file(f)
+        f.close()
         if_status = [False, False, False]
         for ifv in i2.interfaces.values():
             if ifv.name == "files_search_usr":

sepolgen/tests/test_objectmodel.py

@@ -25,6 +25,7 @@ class TestInfoFlow(unittest.TestCase):
         info = sepolgen.objectmodel.PermMappings()
         fd = open("perm_map")
         info.from_file(fd)
+        fd.close()
 
         pm = info.get("filesystem", "mount")
         self.assertEqual(pm.perm, "mount")