Display full exception cause chain.
Fix: standalone .war not configured properly.
Get rid of old UserService and UserServiceApi classes.
Get rid of old SystemService and SystemServiceApi classes.
Move entity and service proxies to dedicated packages.
Get rid of AdminService and AdminServiceApi
Get rid of old hosts API.
Fixes: host list display for non-admin users, user list refresh after user save.
Replace shared TraceInfo structure with TraceInfoProxy, get rid top level trace query REST interface.
Move TraceID map API from REST to RequestFactory.
Merge branch 'dev2' into dev1
Move trace detail APIs to RequestFactory.
Reorganize model classes and property classes after getting rid of REST shared structures.
Get rid of REST libraries.
Inject service and entity locators properly. Get rid of static injector field and default constructors.
Fix JSON serialization / deserialization.
Get rid of manual request scope "management", use Guice scoping features for this.
Fix unit tests, enable tests broken by REST->RF migration and ignored.
Fix getTidMap() API: now it returns proper symbols, not String pairs.
Clean up unused imports.