/var/vcap/store should not have 5% root reservation

[CAFxX]

Currently all filesystems are created with the default 5% disk space reservation for privileged processes. While this make sense for root filesystems, it's hard to justify for volumes that are normally only written to by non-root users (vcap), especially since it's not uncommon (at least in our experience) to have very large volumes (and, therefore, quite big amounts of unusable disk space)

I think it should be safe to use -m 0 on /var/vcap/store and /var/vcap/data, but if that's deemed too risky (why?) I would at least suggest lowering the reservation to some smaller value.

[cppforlife]

@CAFxX i think it makes to be removed for persistent disk. for ephemeral storage it becomes a bit interesting since we have /var/vcap/data/root_log (bind mount from /var/log) placed there and it's written by auditd and rsyslog. not sure if they would be affected in a negative way. wdyt?

[CAFxX]

@cppforlife right, I forgot about that. Then yes, just /var/vcap/store.