added git pre commit hook to run flake8

tools/git_hooks/pre-commit

@@ -0,0 +1,2 @@
+#!/bin/bash
+ansible-playbook -i "127.0.0.1," tools/git_hooks/pre_commit.yml

tools/git_hooks/pre_commit.yml

@@ -0,0 +1,8 @@
+- hosts: all
+  connection: local
+  gather_facts: false
+  tasks:
+    - name: lint check w/ flake8
+      command: 'flake8 {{ playbook_dir }}/../../'
+      register: result
+