Add a stricter equivalent to dojo/DeferredList to dojo/promise/*

[cjolif]

dojo/promise/all is fullfilled as rejected as soon as a single of the promise is rejected.

with dojo/DeferredList it was possible to be fullfilled (possibly as rejected) only when all the Deferred were fullfilled (with at least one rejected).

[nickmaynard]

We've found a couple of issues where we've been forced to use DeferredList? to achieve this function. In our case, we needed to wait until two asynchronous processes were finished/fulfilled (regardless of their end state), before we could kick off the next operation.

We couldn't do this with dojo/promise/all (which races to completion as soon as one of the constituent promises is rejected).

So in other words, something like dojo/promise/all that only fulfils once /all/ its constituent promises are fulfilled. (Note: fullfilled -> resolved OR rejected)

[dylan]

Given that no one has shown interest in creating a patch in more than a year, I'm closing this as patchwelcome. Please let us know if you would like to get involved in helping make this change to Dojo!