Fix error handling of XML include.

[ye-luo]

Close #1423
Now the code stops correctly reporting the following without a crash.

I/O warning : failed to load external entity "PTCL_XML"
ERROR File PTCL_XML is invalid
I/O warning : failed to load external entity "WFS_XML"
ERROR File WFS_XML is invalid
ERROR ERROR: No target particle e exists.
ERROR Illegal input. Missing particleset 
ERROR Input document does not contain valid objects

[prckent]

Can we hard abort after "ERROR File PTCL_XML is invalid"? No use to continue processing.

[ye-luo]

Now

I/O warning : failed to load external entity "PTCL_XML"
ERROR File PTCL_XML is invalid
application called MPI_Abort(world, 1) - process 0

[ye-luo]

Test this please