[6/9] Use DbusRule and DbusRuleset

Change aa.py to use DbusRule and DbusRuleset in profile_storage,
parse_profile_data() and write_dbus. This also means we can drop the
now unused parse_dbus_rule() and write_dbus_rules() functions.

Raw_DBUS_Rule in rules.py is now also unused and can be dropped.


Also shorten the list of known-failing tests in
test-parser-simple-tests.py. Even if the list of removals doesn't look
too long, the generated_dbus/* removals mean 1989 tests now cause the
expected failures.

OTOH, I had to add 4 tests to the known-failing list:
- 3 tests with a "wrong" order of the conditionals which the parser
  accepts (which is slightly surprising, because usually we enforce the
  order of rule parts)
- one test fails because the path in the path= conditional doesn't start
  with / or a variable. Instead, it starts with an alternation, which
  wouldn't be allowed in file rules.

Those 4 failures need more investigation, but shouldn't block this
patchset.


Finally, adjust test-regex_matches.py to import RE_PROFILE_DBUS from
apparmor.regex instead of apparmor.aa.


Acked-by: Seth Arnold <seth.arnold@canonical.com>

utils/test/test-regex_matches.py

@@ -14,7 +14,8 @@ import unittest
 from common_test import AATest, setup_all_loops
 from apparmor.common import AppArmorBug, AppArmorException
 
-from apparmor.regex import strip_parenthesis, strip_quotes, parse_profile_start_line, re_match_include, RE_PROFILE_START, RE_PROFILE_CAP, RE_PROFILE_PTRACE, RE_PROFILE_SIGNAL
+from apparmor.regex import ( strip_parenthesis, strip_quotes, parse_profile_start_line, re_match_include,
+     RE_PROFILE_START, RE_PROFILE_DBUS, RE_PROFILE_CAP, RE_PROFILE_PTRACE, RE_PROFILE_SIGNAL )
 
 
 class AARegexTest(AATest):
@@ -256,7 +257,7 @@ class AARegexDbus(AARegexTest):
     '''Tests for RE_PROFILE_DBUS'''
 
     def AASetup(self):
-        self.regex = aa.RE_PROFILE_DBUS
+        self.regex = RE_PROFILE_DBUS
 
     tests = [
         ('   dbus,',                                    (None,      None,   'dbus,',                            None,                       None)),