[SDFAB-868] Create new job for running nightly BESS-UPF linerate tests

* Implements a new template containing parameters for the job
* Implements a new pipeline defining job behavior and steps
* Fix virtualenv invocation - zdw

Change-Id: I54189595af50fcdac5206bc00df38080b39a2d95
diff --git a/Makefile b/Makefile
index 0f8597c..93a30a5 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@
 
 $(VENV_DIR):
 	@echo "Setting up virtualenv for JJB testing"
-	virtualenv $@
+	python3 -m venv $@
 	$@/bin/pip install jenkins-job-builder==$(JJB_VERSION) pipdeptree
 
 $(JOBCONFIG_DIR):