fix some requirements updater breakage

- remove requirements_ansible logic from the update script
- removed the need for py2-specific system dependencies
- update to the latest pip-tools and move to the new long format
  (https://github.com/jazzband/pip-tools/pull/1237)
- fixed a few busted references to receptorctl @ devel

tools/ansible/roles/dockerfile/templates/Dockerfile.j2

@@ -141,6 +141,7 @@ RUN dnf -y install \
     strace \
     vim \
     nmap-ncat \
+    libpq-devel \
     nodejs \
     nss \
     make \