DEMRUM-2355 Update JSON encoding

[SMickelsn]

• Modified date formatting of timestamp
• Added nested support for JSON encoding.

[carlosmcevilly]

lgtm!

[SMickelsn]

I've made some large changes to the crash module.

• Updated the send logic to send discrete attributes, rather than a string encoded body element, to more correctly mimic the existing crash reporting object.
• Modified the code into several extensions to make it more readable.
• Given the multiple attributes, I am using direct span logic as with other modules, rather than the existing publish
• I have left the existing crash event logic in place in case it is prefered to modify it rather than the span logic currently in place.
• Unit tests are not complete currently