common: query calls return incorrect IA handle to consumer

common: query calls return incorrect IA handle to consumer

The IA handle from the consumer perspective is an IA vector and
not the provider IA address handle. Need to convert IA handle
to IA vector for consumer calls.

Modify dats_ia_get_handle call to convert both ways depending
on handle type provided so a dapl provider can convert to vector
on query calls. This fix is backward compatible with older libdat2
libraries. Function is already exported and syntax is unchanged.

Signed-off-by: Arlin Davis <arlin.r.davis@intel.com>