[maven-plugin] add logging to RequstorMojo;
add configurable sleep to DestroyMojo
extract Store from SorcerDatabaseViews (potentially part of the public API);
implement temporary protocol handler registration mechanism
[pom] remove erronous dependency from ju-arihtmetic to rio-platform;
[API] Split ProviderAccessor to service-specific accessors, keep facade in sorcer-api/SorcerProviderAccessor