patchtest: clean up test suite

Various tweaks to make the test suite cleaner and more efficient:

- Replace use of "re" module with "pyparsing" in tests (but not base.py)
- Make test_mbox_cve only check for CVE tags in the commit if the added
  patch has them
- Make test_mbox_cve SKIP instead of PASS if there's no CVE tag
- Simplify the bugzilla tag checking test now that pyparsing is used
- Modify the selftest script to correctly parse the new result output

(From OE-Core rev: 7a187c2475aa762e2bc830950f608143f2535a72)

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/patchtest/tests/test_patch_cve.py

@@ -19,12 +19,12 @@
 
 import base
 import os
-import re
+import pyparsing
 
 class CVE(base.Base):
 
-    re_cve_pattern = re.compile("CVE\-\d{4}\-\d+", re.IGNORECASE)
-    re_cve_payload_tag     = re.compile("\+CVE:(\s+CVE\-\d{4}\-\d+)+")
+    re_cve_pattern = pyparsing.Regex("CVE\-\d{4}\-\d+")
+    re_cve_payload_tag = pyparsing.Regex("\+CVE:(\s+CVE\-\d{4}\-\d+)+")
 
     def setUp(self):
         if self.unidiff_parse_error:
@@ -39,10 +39,10 @@ class CVE(base.Base):
 
     def test_cve_tag_format(self):
         for commit in CVE.commits:
-            if self.re_cve_pattern.search(commit.shortlog) or self.re_cve_pattern.search(commit.commit_message):
+            if self.re_cve_pattern.search_string(commit.shortlog) or self.re_cve_pattern.search_string(commit.commit_message):
                 tag_found = False
                 for line in commit.payload.splitlines():
-                    if self.re_cve_payload_tag.match(line):
+                    if self.re_cve_payload_tag.search_string(line):
                         tag_found = True
                         break
                 if not tag_found: