Introduced DigitalSignatureWithCert and SignedDataWithCert as internal APIs, with the expectation that they will become public; renamed the network parameters end-point to network-parameters; updated the network-map.rst doc; and did some refactoring.
Copying of the node-info files moved out of Cordform and into NetworkParametersGenerator (which is now called NetworkBootstrapper). This class becomes an external tool to enable deployment of nodes in a test setup on a single filesystem.
* Take maximum message size from network parameters
* Add epoch handling
* Add handling of network parameters mismatch
Change NetworkMapClient and updater, add handle in
AbstractNode that results in node shutdown on parameters mismatch. Later
on we should implement proper handling of parameters updates.
Add tests of NetworkParameters wiring.
When node starts with compatibilityZone url configured it takes
networkParameters from the networkMap.
* Permit only one network parameters file
On node startup network parameters are read from node's base directory,
we permit only zero or one files to be there. If network map server is
configured the parameters can be downloaded at startup (if not present
in the directory already).
* Update docs on network map endpoints
