Added test for disconnected node when reading XMLBIF model from files Refers https://github.com/pgmpy/pgmpy/issues/938
Added test for disconnected node when reading XMLBIF model from files
Refers https://github.com/pgmpy/pgmpy/issues/938

khalibartan/pgmpy,ankurankan/pgmpy,ankurankan/pgmpy,pgmpy/pgmpy,pgmpy/pgmpy,khalibartan/pgmpy