Vagrant: No longer remount the config/ directory

The virtual machine uses its own config files beneath /etc/icingaweb.
Vagrant: Fix file permissions of mount.vboxsf

refs #5982
Bootstrap/Web: Only load authentication.ini if needed

fixes #6238
Puppet/Icinga2: Fix installation for Icinga2-2.0.0beta2
ExternalAuthentication: Move authenticationMode to config.ini

fixes #6214
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
cli cfg: Make sure to pass config definitions to conversion hooks (WIP)

refs #5929
cli cfg: Rename 'parse' command to 'migrate'

Refs #5929
cli cfg: Add temporary debug output.