CSP changes

In release-6.0.0 SunbirdED is going with cloud agnostic. To achieve this SunbirdED has built the SDK to help all the service use same code base as much as it can.

1. SunbirdED team has created a node SDK that will be used by all the node services for implementing the cloud agnostic features. for more details please refer the below link https://github.com/Sunbird-Ed/client-cloud-services

2. SunbirdED Team has created a SDK in scala which is used by all the backend services to implement the cloud service features. for more details refer link https://github.com/project-sunbird/sunbird-cloud-storage-sdk

3. Sunbird editors has created the fileupload plugin for azure cloud service please refer the details here https://knowlg.sunbird.org/use/release-notes/release-5.5.0#file-upload-library

SunbirdED has been tested in Azure Cloud provider and the application is working as expected.