arm-template-merge should point to where the event it is occurring

[cateruels]

Summary

While trying to merge various json files from various sources, once an error event is thrown, it doesn't points to where the event is happening.

For instance :

Error: Property "parameters.appName" cannot be merged. Source and target values are different.

Imagine that, in a given case scenario, i have to merge 100 json files. Going through all of them to see where the error is, would be a daunting task.

Desired solution

The proposed solution to this problem would be, given the error event, to point to where among the files being merged, is the event happening.

For example,

Error: Property "parameters.appName" cannot be merged.
Conflict file(s) : aaaa.json, bbbb.json, cccc.json,, and so on