Investigate issue with devops sudo handler

[Maksym Strukov]

https://custom-ci.infra.mirantis.net/job/10.0.custom.system_test/1202/console
For some reason check_call(ip=..., sudo=True, command='shutdown +1') inside `def warm_shutdown_nodes` doesn't work.

Need to investigate why.
Workaround is to add `sudo` to command

[Aleksei Stepanov (penguinolog)]

Current status:
Devops successfully receives sudo flag from ssh manager. On fuel-devops 2.9.23 spike is used, on 3.0.2 standard API is used.
Investigating on devops side.

[Aleksei Stepanov (penguinolog)]

>>> ssh.execute('id', verbose=True)
uid=1000(ubuntu) gid=1000(ubuntu) groups=1000(ubuntu),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),111(lxd),115(lpadmin),116(sambashare),117(libvirtd)
2016-09-12 10:15:20 - INFO - ssh_client.py:853 -- 'id' execution results:
Exit code: EX_OK<0(0x00)>
STDOUT:
uid=1000(ubuntu) gid=1000(ubuntu) groups=1000(ubuntu),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),111(lxd),115(lpadmin),116(sambashare),117(libvirtd)
STDERR:

ExecResult(cmd='id', stdout=['uid=1000(ubuntu) gid=1000(ubuntu) groups=1000(ubuntu),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),111(lxd),115(lpadmin),116(sambashare),117(libvirtd)\n'], stderr=[], exit_code=EX_OK<0(0x00)>)
>>> with ssh.sudo(True):ssh.execute('id', verbose=True)
uid=0(root) gid=0(root) groups=0(root)
[sudo] password for ubuntu: 2016-09-12 10:15:43 - INFO - ssh_client.py:853 -- 'id' execution results:
Exit code: EX_OK<0(0x00)>
STDOUT:
uid=0(root) gid=0(root) groups=0(root)
STDERR:
[sudo] password for ubuntu:
ExecResult(cmd='id', stdout=['uid=0(root) gid=0(root) groups=0(root)\n'], stderr=['[sudo] password for ubuntu: '], exit_code=EX_OK<0(0x00)>)

Need to check detaily on CI with dedicated test