This fixes issue #1377

* wip(backend): set real file format in definition

issue #1324

* refactor(test): best way to clean iptables

issue #1324

Added this as a request and runs before auto start machines

fix(volumes): convert to qcow2 old raw bases

* test(volumes): upgrade old raw volumes

close issue #1385

fix(frontend): fixed base forms

issue #1384

issue #1311

fix(volumes): properly define backing files

* test(volumes); tries to rebase a volume
* test(volumes); create test qcow2 volumes
* refactor(volumes): base for qcow2 volumes is copy
* test(volumes): base from base

closes issue #1381

refactor(backend): refresh backing store and driver

* refactor(test); more verbose output
* wip(volumes): get info in shared mode

issue #1324

Co-authored-by: frankiejol <frankie@telecos.upc.edu>

closes issue #1307

issue #1286

feature(backend): run Ravada on Focal Fossa Ubuntu 20.04

* fix(backend): fixed qcow and iptables path
* fix(volumes): fixing qcow2 backing files
* refactor(nodes): find command properly when has args
* test(nodes): improved some tests on focal

issue #1324

* refactor: removed not best practice return undef

* test: do not test LXC by now

* refactor(backend): generic list networks

Unexposed 5939 teamviewer port

Issue #1328

* fix(docker): upgrade libs

now that screenshots are stored in databse, libmojolicious-plugin-renderfile-perl is not required anymore

Issue #1344