* wip(cli): use faster machine listing

issue #984

* feature(backend); set process priorities

issue #984

* wip(backend): cache connections and check free memory

Now Virtual Manager connections are cached.
When balancing VMs, check if machine memory fits

issue #984

* wip(backend): ignores disabled nodes, disable when one fails

When a node is disabled, try not to use it.
When a node fails, set disabled.
Use process priorities.
Improve MAC address generation on KVM

* fix(KVM): don't reset the password if machine up

issue #955

* wip(backend): remove forkmanager

We handle forks ourselves so we can tweak this more.
ie we can allow more process with more nodes.

issue #984

* test(nodes): check remote remove base

issue #984

* test(nodes): migrate without CD and fix volume names

issue #984

* test(download): give time process to start

* test(nodes): check base and volatile clones

issue #984

* wip(nodes): cached nodes and allow clone when preparing base

Check the cached nodes are there and not renamed
When preparing a remote base allow to clone the machine

issue #984

* refactor(KVM): disable nodes and better UUID

creating random uuids sometimes failed

issue #984

* wip(requests): kill request if pid not found

issue #984

* test(volumes): create mock volumes with different names

issue #984

* refactor(nodes): clean remote bases

issue #984

* test(nodes): check volatile clones on remote

* test(backend): properly create mock domains

issue #984

* refactor(KVM): cope with duplicated uuids

issue #984

* refactor(nodes): disable failed remote domains

also cope with duplicated uuids on migration

issue #984

* refactor(nodes): improve balancing failover and volatile

issue #984

* test(pools): check unique uuid on creation

issue #984

* refactor(nodes): fixed remove base on remote down node

issue #984

* refactor(nodes): do not check active if node down

issue #984

* refactor(requests): allow shutdown timeout on refreshing vms

May come useful one day, handy for testing by now

issue #984

* refactor(tests): removed debug

* refactor(test): check down domain on disabled/down nodes

issue #984

* refactor(backend): return all known remote ips

In some cases may be more than 1 remote ip, probably
when accessing from localhost

issue #984

* refactor(test): wait more for remote machines down

issue #984

* refactor(backend): use timeout shutdown only if defined

issue #984

* refactor(nodes): deal with down node on refresh

issue #984

* refactor(nodes): open machine on requested node

issue #984

* refactor(test): properly test down node

issue #984

* refactor(test): new request ordering makes this test obsolete

issue #984

* refactor(test): make sure test node starts ok

issue #984

* refactor(backend): deal with is_active failing

issue #984

* refactor(nodes): fallback on local machine if remote fails

issue #984

* fix(requests): create instead create_domain

issue #984

* refactor(nodes): connect on is_alive cold deep recurse

Also private method to clean cache

issue #984

* refactor(kvm): removed annoying debug message

issue #984