Field level patchStrategy not always applied

[cgendreau]

The code in ResourcePatchController updateValues is not re-checking for every fields.

crnk-framework/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/ResourcePatchController.java

Line 196 in 252b782

if (patchStrategy == null) {

Not sure about the intention or intended behaviour but I suspect it should check at every field of type Map to get the specific patchStrategy and if there is nothing default to the repo strategy ?