* CORDA-2535 Move classes from test src to main
For some reason a load of classes were in the test src rather than the
main src even though they were needed during runtime. These have been
moved back into main so they are compiled for use in the demo app.
* CORDA-2535 Fix missing trade id irs-demo home page
Change `deal.ref` to `deal.common.tradeID`
* CORDA-2535 Highlight in irs-demo that `node` module should not be depended on
The demo relies on `node` unless some larger refactoring is made. This
is being kept as it is, but to discourage developers from doing the
same in their CorDapps, a comment has been added to `build.gradle`
explaining why it is there and that developers should not do the same.
This includes all of the cash selection logic, JSON support using jackson and a bunch of utilities which are not relevant to contract verification. The exception to this are Interpolator which has been moved to the IRS demo, and PhysicalLocationStructures.kt which is now in explorer.
