Removes unused posix_ipc requirement
Removes unused posix_ipc requirement

posix_ipc module is not used anywhere in this project.

Change-Id: Idc0b3c1b4e572cc348a638a02aa63eaeb1265b45

NeCTAR-RC/murano,olivierlemasle/murano,openstack/murano,DavidPurcell/murano_temp,NeCTAR-RC/murano,NeCTAR-RC/murano,DavidPurcell/murano_temp,olivierlemasle/murano,satish-avninetworks/murano,olivierlemasle/murano,satish-avninetworks/murano,satish-avninetworks/murano,DavidPurcell/murano_temp,DavidPurcell/murano_temp,satish-avninetworks/murano,NeCTAR-RC/murano,olivierlemasle/murano,openstack/murano