Test: Stop publishing non-existing values in get_state

We removed several classes in the history, let's update the get_state to
remove methods, that are not used anymore.

Note that some of the variables were related to Avocado-vt, anyway the
usage of `get_state` from Avocado depends only on it's values. If
Avocado-vt needs to publish it's internal values, it can override this
method and do so, anyway at this point this is not necessary.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

avocado/core/test.py

@@ -443,8 +443,8 @@ class Test(unittest.TestCase):
         """
         if self.running and self.time_start:
             self._update_time_elapsed()
-        preserve_attr = ['basedir', 'debugdir', 'depsdir', 'fail_reason',
-                         'logdir', 'logfile', 'name', 'resultsdir', 'srcdir',
+        preserve_attr = ['basedir', 'fail_reason',
+                         'logdir', 'logfile', 'name', 'srcdir',
                          'status', 'time_elapsed',
                          'traceback', 'workdir', 'whiteboard', 'time_start',
                          'time_end', 'running', 'paused', 'paused_msg',