feature(config): enforce config validation

* doc(test): configuration to test nodes
* test(config): check configuration is ok

closes issue #763

feature(backend): set proper listen IP for display

* test(network): check display IP in proper network
* feature(backend): set proper listen IP for display
* refactor(test): now remote ip is localhost

issue #1041

feature(KVM): manage network interfaces

* feature(frontend): get network interfaces
* feature(backend): manage KVM network interfaces
* feature(network): list network interfaces

* test(backend): test KVM network interfaces
* test(KVM): skip network bridge if not available
* test(network): test network bridge
* test(network): test list interfaces

* refactor(frontend): hide list requests and properly wait

issue #1011

close #1052

issue #1054

issue #1042

issue #1042

fixed test so disk size values are passed

issue #1062

* feat(i18n): Add Vietnamese option

Issue #1027

* feat(i18n): Add vi.po

Issue #1027

Issue #1057

fix(translation): login failed messages

* fix(i18): hardcoded
* Add to en.po files
* fix(i18n): Add transifex files es.po and ca.po
* Remove error file

Issue #1028

- Add to en.po files

Issue #1028

Update en.po and translatd to spanish and catalan

Issue #1039

issue #1045

feature(backend): check for free disk space

* test(volumes): check error when disk full
* test(backend): check disk space before prepare base
* fix(backend): error when no space available


issue #10

Upgrade bootstrap to version 4.3.1 and ckeditor to version 4.11.3.

Issue #1037

issue #990

Also change the alpine XML so it can be used in tests.
Before Alpine 3.7 was using yakketi XML.

issue #1033

fix(backend): move to master and remove clones on change hard

* test(nodes): check removed remote clones if change hardware
* refactor(KVM): remove excess amount below zero
* test(nodes): check removed remote clones if change hardware
* refactor(test): reload daemon user grants for testing
* refactor(grants): new private method to reload grants

issue #1025

fix(nodes): remove from remotes

* test(nodes): configure 2 remote nodes
* test(remove): test remove from requests
* test(nodes): Remove machine from 2 nodes + master

issue #1026

Correctly remove machines from remote nodes

* test(nodes): configure 2 remote nodes
* test(remove): test remove from requests
* test(nodes): Remove machine from 2 nodes + master
* fix(nodes): remove from remotes

fixes issue #1026

fix(frontend): on grants_clone_all empty bases aren't showed

fix #1013

issue #1010

* test(KVM): check smbios section is in the machine definition
* feature(KVM): add the hostname in smbios strings

issue #1010

* test(storage): check no shared storage
* feature(storage): do not sync shared storage

issue #1104

* refactor(backend): cache is active
* refactor(backend): check first if there are SWAP vols

instead of checking it all the time

issue #1012

this made test for grant shutdown to fail

* feature(frontend): allow create cdrom disk devices
* refactor(backend): allow cdrom volumes
* test(backend): test CD rom and boot order

issue #973

* fix: listing problems respect grant

refactor of grants
-can_clone_all shows all domains but has only acces to clones
-can_clones shows only clones from owned base
-the can_list_xxxx functions works as grups of the can_grants functions
-added is_user_manager for managing users
-is_operato is and conjuntive operation of can_list and is_user_manager

tests checked and adaptet to new hierarchy
added thest 70_list.t to test the listing operations

fix #1003