GKE Cannot get a list of clusters/containers/pods

## Summary

Cannot get a list of GKE (Google Kubernetes Engine) clusters/containers or pods

## Detailed Information

As mentioned in the documentation, followed the get_driver API to get the container driver for the GKE provider. But got the below stacktrace.
```
Traceback (most recent call last):
File "/home/lkp//list-instances.py", line 146, in
main(sys.argv[1:])
File "/home/lkp/list-instances.py", line 51, in main
list_container_gce()
File "/home/lkp/list-instances.py", line 37, in list_container_gce
for cluster in driver.list_containers():
File "/usr/lib/python2.7/site-packages/libcloud/container/drivers/kubernetes.py", line 163, in list_containers
ROOT_URL + "v1/pods").object
File "/usr/lib/python2.7/site-packages/libcloud/container/drivers/gke.py", line 68, in request
response = super(GKEConnection, self).request(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/libcloud/common/google.py", line 815, in request
*args, **kwargs)
File "/usr/lib/python2.7/site-packages/libcloud/common/base.py", line 650, in request
response = responseCls(**kwargs)
File "/usr/lib/python2.7/site-packages/libcloud/common/base.py", line 162, in __init__
self.object = self.parse_body()
File "/usr/lib/python2.7/site-packages/libcloud/common/google.py", line 278, in parse_body
raise ResourceNotFoundError(message, self.status, code)
libcloud.common.google.ResourceNotFoundError: u'\n\n \n \n Error 404 (Not Found)!!1\n \n *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px}\n \n \n

404. That\u2019s an error.\n

The requested URL /v1/projects/absolute-point-196613/api/v1/pods was not found on this server. That\u2019s all we know.'

```
Libcloud version: 2.8.0, 3.0.0-rc1
Python version: 2.7, 3.7
OS: Fedora 30

Đọc libcloud/container/drivers/kubernetes.py:list_containers và libcloud/container/drivers/gke.py:request, sau đó lần theo request qua libcloud/common/google.py. Tái hiện lỗi 404 được báo cáo và kiểm tra lý do /v1/projects/absolute-point-196613/api/v1/pods được request. Hoàn tất khi việc liệt kê cluster, container và pod GKE không còn thất bại với response này.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.