Work on database backed NetworkMapCache
Make NodeInfo JPA entity.
Enable node startup with it's database network map cache. Fix schema.
Make node not wait for finishing network map service registration if it
successfully loaded data from database.
Add tests for startup without NetworkMapService.
* Rename networkMapRegistrationFuture
Change networkMapRegistrationFuture to nodeReadyFuture, it no longer
indicates the NetworkMapService registration, because we are able to run
network without map service configured.
* Partially integrate database into NetworkMapCache
Full integrtion will come with service removal.
Move MockServiceHubInternal to net.corda.node.testing
* Add workaround to transaction scope race
Temporary workaround to force isolated transaction (otherwise it causes race conditions when processing
network map registration on network map node).
* Remove WorldMapLocation from NodeInfo
Infer the node's location based on X500 name
Add serial number on NodeInfo
For tests of running without NetworkMap, start nodes with nonexistent NetworkMap address
Make clearNetworkMapCache callable via RPC.