hyperv/utility: share status return values

[honzhan_microsoft.com]

Summary

This patch did the following improvements:
(1) Never use the status flag as return values for both hv_kvp_daemon and hv_kvp.c.
(2) Move the status code from kvp specific file to a shared file, which can be used by other utility modules, like VSS.
(3) Fix the issue of missing quote.

Submitted by: Hongjiang Zhang <honzhan microsoft com>