Replaced vlistDefVarEnsemble() by cdiDefKeyInt().

ChangeLog

examples/cdi_write_ens.c

src/cdf_write.c

src/cdi.h

src/cdi.inc

src/cdiFortran.c

src/stream_cdf_i.c

src/stream_cgribex.c

src/stream_gribapi.c

src/varscan.c

src/vlist_var.c