Prevent assigning IP address from vm_network pool to mgmt interface.

In provisioning process new node get IP address equal to last assigned
address + 1. Before get last assigned IP we must filter out addresses
from vm_network pool to not choose one of it as a base for
calculation of IP address reservation for mgmt interface of new node.
Merge pull request #11 from michalskalski/master

Prevent assigning IP address from vm_network pool to mgmt interface.
role::monitoring::server for monit type node
Merge pull request #12 from kswia/feature/monitoring

monitoring feature introduced; role::monitoring::server for monit type node
setfacl used to give logstash permissions to read logs
Merge pull request #13 from kswia/hotfix/logstash-permissions

setfacl used to give logstash permissions to read logs
Updated documentation with community section.

Added reference to Freenode IRC channel.

Verification: X0909309-0X9090