Pagination support for various cli commands

[abhijeetkaurav1st]

Api response can be configured to support for pagination. For now default length for api response used is 20. So following steps may happen:

1. Increase default length in requested payload for apis
2. Add pagination if enquired entity still doesn't fit in default requested length(using offset).
3. Search for entity by name if api supports Affected commands: calm create provider_spec, calm describe project etc.