Shore up support of numeric_data, mask others
Shore up support of numeric_data, mask others

The numeric_data type was not handled, handle it.

boolean and cmd_data are not currently supported, mask them for now.

Change-Id: I11bad320237fbcf7fd630f7b55cb30cff66d2845

openstack/pyghmi,openstack/pyghmi,stackforge/pyghmi