admin: Add filters for users

Add auth provider filter.
admin: Update VM filters

Add ID filter and filter for suspended VMs. The filter is currently
non-functional due to the fact that it receives a list as value.
admin: Add extra filter for volumes
admin: Add filters in network list

Add filter for ID, description, owner name, owner UUID and VM ID
admin: Add filters for IPs

Add the following filters:
* ID
* Address (IPv4/IPv6)
* Floating IP (not functional yet due to the boolean issues)
* Owner Name
* Owner UUID
admin: Add project filters

Add the following filters:
* ID
* UUID
* Name
* Description

The status filter is on the works but is currently not working.
Merge branch 'feature-admin-moar-filters' into feature-admin