py3: whitelist 15 more tests passing on Python 3

py3: whitelist 15 more tests passing on Python 3

We have reached the count of 75 tests passing on Python 3.

Differential Revision: https://phab.mercurial-scm.org/D858

--- a/contrib/python3-whitelist	Sat Sep 30 15:48:08 2017 +0530
+++ b/contrib/python3-whitelist	Sat Sep 30 18:19:14 2017 +0530
@@ -1,15 +1,20 @@
 test-addremove.t
 test-ancestor.py
 test-backwards-remove.t
+test-bheads.t
+test-bisect2.t
+test-bookmarks-merge.t
 test-bookmarks-strip.t
 test-branch-tag-confict.t
 test-casecollision.t
+test-changelog-exec.t
 test-check-commit.t
 test-check-execute.t
 test-check-module-imports.t
 test-check-pyflakes.t
 test-check-pylint.t
 test-check-shbang.t
+test-commit-unresolved.t
 test-contrib-check-code.t
 test-contrib-check-commit.t
 test-debugrename.t
@@ -21,15 +26,21 @@
 test-diff-subdir.t
 test-dirstate-nonnormalset.t
 test-doctest.py
+test-double-merge.t
 test-duplicateoptions.py
 test-empty-dir.t
+test-empty-file.t
 test-empty.t
 test-encoding-func.py
 test-excessive-merge.t
 test-hghave.t
 test-imports-checker.t
 test-issue1089.t
+test-issue1877.t
 test-issue1993.t
+test-issue612.t
+test-issue619.t
+test-issue672.t
 test-issue842.t
 test-journal-exists.t
 test-locate.t
@@ -38,6 +49,7 @@
 test-match.py
 test-merge-default.t
 test-merge2.t
+test-merge4.t
 test-merge5.t
 test-permissions.t
 test-push-checkheads-pruned-B1.t
@@ -50,11 +62,14 @@
 test-push-checkheads-unpushed-D1.t
 test-push-checkheads-unpushed-D6.t
 test-push-checkheads-unpushed-D7.t
+test-rename-merge1.t
 test-rename.t
 test-revlog-packentry.t
 test-run-tests.py
+test-show-stack.t
 test-status-terse.t
 test-terse-status.t
 test-unified-test.t
+test-update-issue1456.t
 test-update-reverse.t
 test-xdg.t