Use boost::uuids::uuid stream operators instead of boost::uuid::
string_generator to convert received xml string to uuid to avoid
handling invalid uuid string exception. Use stringstream fail to
determine if invalid uuid string was passed and log an error.

Change-Id: I394a57532a09f6bff36da1d1df261696550d716c
Merge "Use boost::uuids::uuid stream operators instead of boost::uuid:: string_generator to convert received xml string to uuid to avoid handling invalid uuid string exception. Use stringstream fail to determine if invalid uuid string was passed and log an error."