OSTF-219:
1. Steps in infrastructure tests wre fixed
2. Infrastructure tests were changed to use error codes
3. PEP 8 issuses in sanity foldef fixed
Minor fixes after test execution
Typo fixed
Typo fixed
Obsolete import removed
OSTF-219:
1. Steps in infrastructure tests wre fixed
2. Infrastructure tests were changed to use error codes
3. PEP 8 issuses in sanity foldef fixed
Minor fixes after test execution
Typo fixed
Typo fixed
Obsolete import removed
merge local and gitgub versions of the branch after rebase
PRD-1247 DNS availability test: split on two or rewrite steps

  * DNS availability test has been splitted into two tests
  * constructions like len(<list>)>=0 were removed from
    sanity test set. Scenarios were updated accordingly
  * PEP8 issues were fixed in all the sanity tests
PRD-1247:
  * Typo fixed
  * Infrastructure tests were renamed to be executed in
    more native order
_get_ssh_connection_to_vm updated to use remote connection
PRD-1334: SSH client and NManager were changed to use nested ssh transports
OSTF-1334: fixes after test execution on the labs
PRD-1334: typo fixed
PRD-1334: removing debug info
Merge branch 'master' into prd-1334-instance-connectivity

Conflicts:
	fuel_health/tests/sanity/test_sanity_compute.py
	fuel_health/tests/sanity/test_sanity_infrastructure.py
BaseException.message remocved for compatibility with Python2.6