v186-r1

Deploy kubernetes cluster v1.8.6 with calico v2.6.3 using ansible-playbook.
Binaries are downloadable @ https://pan.baidu.com/s/1c4RFaA
For more information, go to README.md
CHANGELOG:

• update components:
  • kubernetes v1.8.6
  • etcd v3.2.11
  • docker 17.09.1-ce
  • calico/node v2.6.3
• update docs: harbor.md