Make sure requirements_jenkins invokes the other requirements sections

Makefile

@@ -279,6 +279,9 @@ requirements_tower_dev:
 
 # Install third-party requirements needed for running unittests in jenkins
 requirements_jenkins:
+	if [ "$(VENV_BASE)" ]; then \
+		. $(VENV_BASE)/tower/bin/activate; \
+	fi && \
 	pip install -r requirements/requirements_jenkins.txt
 	$(NPM_BIN) install csslint jshint
 
@@ -286,6 +289,8 @@ requirements: virtualenv requirements_ansible requirements_tower
 
 requirements_dev: requirements requirements_tower_dev
 
+requirements_test: requirements requirements_jenkins
+
 # "Install" ansible-tower package in development mode.
 develop:
 	@if [ "$(VIRTUAL_ENV)" ]; then \