[U-Boot] [PATCH] travis: Ensure we use pytest 2.8.7

[Tom Rini]

The latest version of pytest (4.0.0) makes some of the code we have in
test/py/conftest.py a fatal error that needs to be migrated.
Unfortunately this in turn requires changes that don't exist in older
versions of pytest such as 2.8.7 that ships with Ubuntu 16.04.  Force
travis to use this older version of pytest.

Signed-off-by: Tom Rini <trini at konsulko.com>
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 6ce2ef7fbaaa..a061f02399c0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,7 +47,7 @@ install:
  - cat ~/.buildman
  - virtualenv /tmp/venv
  - . /tmp/venv/bin/activate
- - pip install pytest
+ - pip install pytest==2.8.7
  - pip install python-subunit
  - grub-mkimage -o ~/grub_x86.efi -O i386-efi normal  echo lsefimmap lsefi lsefisystab efinet tftp minicmd
  - grub-mkimage -o ~/grub_x64.efi -O x86_64-efi normal  echo lsefimmap lsefi lsefisystab efinet tftp minicmd
-- 
2.7.4