refactor nexus_mcu_write to use nexus_mcu.py
Add some verbosity to nexus commands to aid in understanding what is
going on in the louhi logs
Change-Id: Ic54620a5747bbd3725b67d2cdebe274d34f57b59
This is the project containing all the top-level build targets of all the projects within the GoB to set up the environment and build the e2e artifacts.