Reduce the memory requirement from 1.6 to 1.2 GB
We know from practical experience in PR-CI and Azure that 1.2
is the absolute minimum necessary for a base installation.
https://pagure.io/freeipa/issue/8404
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>