Install icingacli and bash completion in Vagrant VM

fixes #6264
refs #5803
Import module 'conftool' for cli.

Refs #5929
Refactor fetching v1 attributes from parent template tree.

Refs #5929
Dump Icinga 2 objects, part 1.

Refs #5929
Add global assign/ignore where (Icinga 2).

Refs #5929
cli cfg: Add servicegroups and basic docs for Icinga 2 migration.

Refs #5929
cli cfg: Add usergroups for Icinga 2 migration.

Refs #5929
cli cfg: Host, Service, User Icinga 2 objects. (WIP)

Refs #5929
cli cfg: Add support for 'import' migration

refs #5929
cli cfg: First attempt of service->host{,group} relations

refs #5929
cli cfg: Convert address* and retry|check_interval

refs #5929
cli cfg: Apply services based on hosts and hostgroups

refs #5929