Introduce quotas per project

[mhausenblas]

It does happen once in a while that training participants happen to scale to, say, 2000 pods just for the giggles and that will leave no resources on the machine to fix the situation. So for self protection, we should create quotas that limit the number of pods per project.

[mhausenblas]

CC: @marekjelen ^^^

[marekjelen]

We need either to

a) Limit project per user [1]
b) Disable self-provisioning of projects [2]
c) Setup quota per project created by the tool [3]

or

a) Setup multi-project quota [4]

[1] https://docs.openshift.org/latest/admin_guide/managing_projects.html#limit-projects-per-user
[2] https://docs.openshift.org/latest/admin_guide/managing_projects.html#disabling-self-provisioning
[3] https://docs.openshift.org/latest/admin_guide/quota.html
[4] https://docs.openshift.org/latest/admin_guide/multiproject_quota.html