Faster venv-ansible-playbook.sh

If running a playbook more than once, there's no need to re-bootstrap
the virtual environment.  Assume if the verified crio directory already
exists, it should be used (after re-asserting hashes of requirements).

Signed-off-by: Chris Evich <cevich@redhat.com>

contrib/test/venv-ansible-playbook.sh

@@ -56,6 +56,8 @@ echo
 (
     set -x
     cd "$WORKSPACE"
+    # When running more than once, make it fast by skipping the bootstrap
+    if [ ! -d "./.cri-o_venv" ]; then
         # N/B: local system's virtualenv binary - uncontrolled version fixed below
         virtualenv --no-site-packages --python=python2.7 ./.venvbootstrap
         # Set up paths to install/operate out of $WORKSPACE/.venvbootstrap
@@ -76,7 +78,7 @@ echo
         ./.venvbootstrap/bin/virtualenv --no-site-packages --python=python2.7 ./.cri-o_venv
         # Exit untrusted virtualenv
         deactivate
-
+    fi
     # Enter trusted virtualenv
     source ./.cri-o_venv/bin/activate
     # Re-install from cache