Improve Client store chunk performance

[maqi]

Current, when a client storing a chunk, it first get closest peers, send send out request to each and wait on all ALL responses (Ok or non-Ok) till complete and return.
This will make the flow slow when connection to one of the nodes is in problem, i.e. a response only got returned after TimeOut.

The performance can be improved by using the similar function as to expect_closest_majority_ok with the dbc spend flow, which will erturn earlier whenever received majority OK responses.
OR even being more agressive to return on the first OK response.