PRCI: update memory reqs for each topology
The memory requirements are defined in the vagrant templates in
https://github.com/freeipa/freeipa-pr-ci/tree/master/templates/vagrantfiles
They have been updated and the corresponding values must be kept
consistent in the topologies for PRCI.
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Armando Neto <abiagion@redhat.com>