Update all package using MASTER_REPOSITORY_OPENROBOTS so that they now use
MASTER_REPOSITORY_OPENROBOTS_TRAC. This is to account for the upcoming
git.openrobots.org migration.

OpenPRS does not support char[] in the signature of activities, so
replace them by a structure encapsulating this char[].
Must fix the bulk build

The MPC planner module provides several tools to plan, record and apply
geometric transformations over a discrete trajectory. The current
version to not include any global motion planning approach of the MPC
library as the current experiments have been focused on exloring an
unknown environment or repeating a learnt trajectory. However, it
provides any I/O tools to load, save, and modify a recorded trajectory.

The MPC dem treatment is aimed at preprocessing the data elevation map
given by the DTM genom module to provide a representation of the
environment understandable by the navigation algorithms. It can compute
slope maps, classify the environment into free or obstacle, and compute
distance to obstacles maps.