tests/tox.sh: increase pytest thread

This is to reflect the ceph-ansible configuration.

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 0a73e11)

tests/tox.sh

@@ -107,7 +107,7 @@ ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-an
 ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/tests/functional/setup.yml
 ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/site-container.yml.sample --extra-vars="ceph_docker_image_tag=latest-nautilus ceph_docker_registry=$REGISTRY_ADDRESS fetch_directory=$CEPH_ANSIBLE_SCENARIO_PATH/fetch"
 
-py.test --reruns 5 --reruns-delay 1 -n 4 --sudo -v --connection=ansible --ansible-inventory="$CEPH_ANSIBLE_SCENARIO_PATH"/hosts --ssh-config="$CEPH_ANSIBLE_SCENARIO_PATH"/vagrant_ssh_config "$TOXINIDIR"/ceph-ansible/tests/functional/tests
+py.test --reruns 5 --reruns-delay 1 -n 8 --sudo -v --connection=ansible --ansible-inventory="$CEPH_ANSIBLE_SCENARIO_PATH"/hosts --ssh-config="$CEPH_ANSIBLE_SCENARIO_PATH"/vagrant_ssh_config "$TOXINIDIR"/ceph-ansible/tests/functional/tests
 
 # teardown
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