This moves a lot of the test support code into its own package which is only imported for tests,
so it's not shipped as a part of core Corda. The node currently depends on this support code to
compile, although future work could try to separate this out. This change highlights that parts
of production code is dependent on test elements (i.e. dummy keys), and makes it harder for
such accidental crosses to occur later.
An integration test category is also added as part of this work, to contribute towards COR-345.
First working Exposed-assisted persistent wallet
Cleaned up Exposed-based persistent wallet
Cleaned up warnings
Fixed up some generic types
Improved comments
Fix up TODO comment
Hikari and config integration
Fix existing tests
Clean up after looking at PR
Clean up commented out lines
Fix initialisation of IRS demo leaving database open
Fix up after rebase
Review feedback. Main change is lazy wallet iteration.
Rebased and incorporated config changes.
Use standardised config loading. Make wallet cash test use persistent wallet.
Added test to ensure wallet retains state in database across instance creation.
Tidy up whitespace and fix bug in test.
