HC2VPP-339: convert postman collections to v2.1.0 format

HC2VPP-339: convert postman collections to v2.1.0 format

Mantaining postman collections in v1 format is difficult
due to UID strings.

Postman collection v2 fixes the issue and many others, see
http://blog.getpostman.com/2015/06/05/travelogue-of-postman-collection-format-v2/

Collections in v1 format, were converted
using postman-collection-transformer.
Output was transformed using JSON.stringify with space='\t',
to be compliant with Postman application which does not support
spaces for indentation.

Coverted collections were tested using Postman v6.1.3.

Previous version of postman collections were renamed
to *_v1.0.0.json or *_v2.0.0.json.
Removal is planned in 18.10 (HC2VPP-338).

Change-Id: I6caf496293fccc1f9aadcdece668b5200fe07122
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>