3 tests failing

[murbans1]

Hi,

I have started pillbox on vagrant and run tests. 3 of them fail. They have issues with webp files.

`======================================================================
FAIL: test_valid (pilbox.test.app_test.AppRestrictedTest)

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/tornado/testing.py", line 136, in call
result = self.orig_method(*args, **kwargs)
File "pilbox/test/app_test.py", line 579, in test_valid
self.assertEqual(resp.buffer.read(), expected.read(), msg)
AssertionError: /?url=http%3A%2F%2Flocalhost%3A46410%2Ftest%2Fdata%2Ftest4.webp&h=300&client=abc&mode=adapt&w=300&sig=3e789c4ae9a341eb8a6dc0805317fe4d809d8df6 does not match pilbox/test/data/expected/test4-300x300-mode=adapt.webp

======================================================================
FAIL: test_valid_resize (pilbox.test.app_test.AppTest)

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/tornado/testing.py", line 136, in call
result = self.orig_method(*args, **kwargs)
File "pilbox/test/app_test.py", line 365, in test_valid_resize
self._assert_expected_case(case)
File "pilbox/test/app_test.py", line 403, in _assert_expected_case
self.assertEqual(resp.buffer.read(), expected.read(), msg)
AssertionError: /?url=http%3A%2F%2Flocalhost%3A40399%2Ftest%2Fdata%2Ftest4.webp&h=300&mode=adapt&w=300 does not match pilbox/test/data/expected/test4-300x300-mode=adapt.webp

======================================================================
FAIL: test_resize (pilbox.test.image_test.ImageTest)

Traceback (most recent call last):
File "pilbox/test/image_test.py", line 145, in test_resize
self._assert_expected_resize(case)
File "pilbox/test/image_test.py", line 343, in _assert_expected_resize
self.assertEqual(rv.read(), expected.read(), msg)
AssertionError: pilbox/test/data/test4.webp does not match pilbox/test/data/expected/test4-300x300-mode=adapt.webp

---

Ran 91 tests in 9.341s

FAILED (failures=3)
[E 171212 12:26:12 testing:737] FAIL
`
Do I need to install something more to make these tests pass?

Cheers,
Maciek

[agschwender]

Regenerated the webp files. Guessing there was an update to the webp libraries that caused its output to change since I didn't pin those versions in the vagrant playbook. I think they were still set for running on trusty instead of xenial, because at the time travis didn't support xenial. Looks like they do now, so updated the webp file and updated travis. If you pull, you should be able to run the tests successfully.

[murbans1]

All tests pass now. Thank You :)