proxy not working on k8s master

[Eli Qiao]

This commit adds a proxy for k8s
Add proxy for k8s

This patch adds proxy in follow places:
1. etcd needs ETCD_DISCOVERY_PROXY when try to do discovery
   /etc/etcd/etcd.conf
2. docker daemon need set proxy to allow downloads images
   /etc/systemd/system/docker.service.d/proxy.conf
3. and for os level, we need to set http_proxy, https_proxy and no_proxy too
   /etc/bashrc
Implements: blueprint discovery-proxy
Co-authored-by: Manjeet Singh Bhatia <email address hidden>
Change-Id: I19c92dc9b4fe195037b5ad4ca49b529cf6be4cfb

but this script not working on k8s master see:

configuring kubernetes (master)
/var/lib/cloud/instance/scripts/part-008: line 8: /etc/systemd/system/docker.service.d/proxy.conf: No such file or directory

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/237861

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/237861
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=6176db8f185bca5ecd686341a100e37c68ff84d6
Submitter: Jenkins
Branch: master

commit 6176db8f185bca5ecd686341a100e37c68ff84d6
Author: Eli Qiao <email address hidden>
Date: Wed Oct 21 11:15:24 2015 +0800

    Fix docker proxy config file not correctly seting on k8s master

    In I19c92dc9b4fe195037b5ad4ca49b529cf6be4cfb , we added proxy for k8s cluster,
    but it is not working on k8s master since master doesn't have
    /etc/systemd/system/docker.service.d/ which is diffenect from minion.

    Beside, this patch also improves hardcode filename in add_proxy.sh.

    Closes-Bug: #1508279
    Change-Id: I03cd504276e9ca99625b93452f832de406cd1fb7
    Co-authored-by: Madhuri Kumari <email address hidden>