utilities: move ovs-ivshm-mngr to utilities folder

Move ovs-ivshm-mngr app to utilities folder removing its own
ovs-ivshm-mngr folder and Makefile.

Change-Id: Ib75d2172544e67f78d129fda1c8aa92002435620
Signed-off-by: Nicolas Pernas Maradei <nicolasx.pernas.maradei@intel.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>