add dbp-req, errors
bug fixes:
PropertyEvaluator - mixed env and system properties;
sorcer-boot - use launcher;
DatabaseProvider - add cause exception
dbp-req: update test - WIP, still not working
DatabaseProvider: call setupDatabase in init; fix configuration;
DatabaseProviderTest: fix environment, add logging;
common-run, Launcher: add sos-platform back to boot CP, required for sos: protocol to work;
common-run.xml: add logback conf where missing;
Merge branch 'dbpreq' into v1.0-M4