[PATCH] tests: tell pip not to check for a newer version

[danek.duvall at oracle.com]

# HG changeset patch
# User Danek Duvall <danek.duvall at oracle.com>
# Date 1497994553 25200
#      Tue Jun 20 14:35:53 2017 -0700
# Node ID 657e3a53dff24205ebeaffa72a378103ba8338d5
# Parent  404b6acfa192b630fab3c371da072eb8b713d4c1
tests: tell pip not to check for a newer version

pip will check to see if it's the latest version, and complain if it isn't.
The --no-index flag implies the --disable-pip-version-check flag, and makes
the warning (and any associated network activity) go away.

diff --git a/tests/test-install.t b/tests/test-install.t
--- a/tests/test-install.t
+++ b/tests/test-install.t
@@ -188,7 +188,7 @@ the default for them.
   $ $PYTHON -m virtualenv --no-site-packages --never-download installenv >> pip.log
 Note: we use this weird path to run pip and hg to avoid platform differences,
 since it's bin on most platforms but Scripts on Windows.
-  $ ./installenv/*/pip install $TESTDIR/.. >> pip.log
+  $ ./installenv/*/pip install --no-index $TESTDIR/.. >> pip.log
   $ ./installenv/*/hg debuginstall || cat pip.log
   checking encoding (ascii)...
   checking Python executable (*) (glob)