Add logs about the pypi mirror

Makes it easier to diagnose when we look at logs if it shows
if we using the internal mirror or not.

Change-Id: I61945e742dc7dcb021ed20cbace4196b32d192c4

modules/jenkins/files/slave_scripts/select-mirror.sh

@@ -36,6 +36,7 @@ EOF
 if grep -x "$org/$project" /opt/requirements/projects.txt 2>&1
 then
     export TOX_INDEX_URL='http://pypi.openstack.org/openstack'
+    echo "Switching on internal pypi mirror $TOX_INDEX_URL for $org/$project"
     cat <<EOF > ~/.pydistutils.cfg
 [easy_install]
 index_url = http://pypi.openstack.org/openstack
@@ -45,6 +46,7 @@ EOF
 index-url = http://pypi.openstack.org/openstack
 EOF
 else
+    echo "$org/$project will not use the internal openstack pypi mirror"
     cat <<EOF > ~/.pip/pip.conf
 [global]
 timeout = 60