Add nginx services control functionality

Add nginx services control functionality

- Modify nginx server template to use clover-controller
in clover-system namespace for file upload
- Add ability to set nginx server paths and move uploaded files
in clover-controller and set/get file upload metadata
- Add cloverctl commands to set nginx server and lb configurations
- Add example yaml files to configure nginx server and
lb v1/v2 from cloverctl
- Modify service definition for http-lb versions to distinguish
the two versions for GRPC messaging from clover-controller in SDC
deployment yaml

Change-Id: I5c6866c5ff3de358939c58ea8c0bde64a69c6eca
Signed-off-by: earrage <eddie.arrage@huawei.com>