Remove export commands from tox based roles

This logic is very specific to openstack-infra and now that we have
exposed tox_environment, it is much easier for jobs to pass into shell
variables into our tox based roles.

Change-Id: I6c5897088158e1e4917d29d72f523f853c254314
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/run-tarball/tasks/main.yaml

@@ -20,8 +20,6 @@
 
     venv={{ tox_envlist }}
 
-    export UPPER_CONSTRAINTS_FILE=$(pwd)/upper-constraints.txt
-
     rm -f dist/*.tar.gz
     tox -e$venv python setup.py sdist
 

roles/run-wheel/tasks/main.yaml

@@ -20,8 +20,6 @@
 
     venv={{ tox_envlist }}
 
-    export UPPER_CONSTRAINTS_FILE=$(pwd)/upper-constraints.txt
-
     rm -f dist/*.whl
     tox -e$venv pip install wheel
     tox -e$venv python setup.py bdist_wheel

roles/tox/tasks/main.yaml

@@ -109,15 +109,6 @@
     bin_path=.tox/$venv/bin
 
     export PYTHON=$bin_path/python
-    export NOSE_WITH_XUNIT=1
-    export NOSE_WITH_HTML_OUTPUT=1
-    export NOSE_HTML_OUT_FILE='nose_results.html'
-    if [[ -z "$TMPDIR" ]]; then
-        export TMPDIR=$(/bin/mktemp -d)
-    fi
-    export UPPER_CONSTRAINTS_FILE=$(pwd)/upper-constraints.txt
-    trap "rm -rf $TMPDIR" EXIT
-
     cat /etc/image-hostname.txt
 
     $script_path/jenkins-oom-grep.sh pre