Fallback to regular runtime map creation if DESCRIBERUNTIMEMAP fails (eg. The session id may have been pre-generated up front, so there is no actual runtime map blob saved yet)
Fallback to regular runtime map creation if DESCRIBERUNTIMEMAP fails (eg. The session id may have been pre-generated up front, so there is no actual runtime map blob saved yet)

Fixes #988

jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout