mstor_unit: more consistent naming
mstor_unit: more consistent naming

* Rename some functions in mstor_unit so that they don't have the same
names as functions in mstor.c.  This should make it easier to use ctags,
etc.

* Standardize names a bit so that (most) things local to mstor_unit.c
start with mstoru_, MSTORU_, etc.

Signed-off-by: Colin McCabe <3142ce8a0bdba4a38073365893e6b74f72d9c512@alumni.cmu.edu>

cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish