Scan templated python files with bandit

This change adds a zuul check job to export any templated python
contained in the helm charts and scan it with bandit for any
potential security flaws.

This also adds two nosec comments on the instances of subprocess
used as they currently do not appear to be malicious, as well
as changing the endpoint_update python code to prevent sql
injection, which satisfies bandit code B608.

Change-Id: I2212d26514c3510353d16a4592893dd2e85cb369

tools/gate/files/template-python.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+EXCLUDES="helm-toolkit doc tests tools logs tmp roles playbooks releasenotes zuul.d python-files"
+DIRS=`ls -d */ | cut -f1 -d'/'`
+
+for EX in $EXCLUDES; do
+  DIRS=`echo $DIRS | sed "s/\b$EX\b//g"`
+done
+
+for DIR in $DIRS; do
+  PYFILES=$(helm template $DIR | yq 'select(.data != null) | .data | to_entries | map(select(.key | test(".*\\.py"))) | select(length > 0) | values[] | {(.key) : (.value)}' | jq -s add)
+  PYKEYS=$(echo "$PYFILES" | jq -r 'select(. != null) | keys[]')
+  for KEY in $PYKEYS; do
+    echo "$PYFILES" | jq -r --arg KEY "$KEY" '.[$KEY]' > ./python-files/"$DIR-$KEY"
+  done
+done

tools/gate/playbooks/osh-bandit.yaml

@@ -0,0 +1,28 @@
+- hosts: all
+  name: openstack-helm-bandit
+  tasks:
+
+    - name: Install Required Packages and Setup Host
+      shell: |
+        set -xe;
+        ./tools/deployment/common/install-packages.sh
+        ./tools/deployment/common/deploy-k8s.sh
+        sudo -H pip install yq bandit
+      environment:
+        zuul_site_mirror_fqdn: "{{ zuul_site_mirror_fqdn }}"
+      args:
+        chdir: "{{ zuul.project.src_dir }}"
+
+    - name: Template out python files
+      shell: |
+        set -xe;
+        make all
+        mkdir -p python-files
+        ./tools/gate/files/template-python.sh
+      args:
+        chdir: "{{ zuul.project.src_dir }}"
+
+    - name: Run bandit against python files
+      shell: bandit -r ./python-files
+      args:
+        chdir: "{{ zuul.project.src_dir }}"