code styling & pep8 refactoring

I've tested this but please run tests on this code before approve.

Change-Id: I69c9a89d3e377a25bf1319909f93ddf18fc8eaf3
Wait for node online status

Suspend, resume and server performance may cause a node to have online=false status.

Change-Id: Id10ecb8540b537eea5669247cd1898e5e5da8597
[vbox] Increasing memory/disk size in vbox scripts.

Closes-Bug: #1253097
Closes-Bug: #1260244

When controller is deployed with Ceph,
768Mb of RAM is not enough. So we have
to increase the default amount of memory
required to run demo environment.
Also, as we now give more space on
controllers for root partition, increased
default disk size as well.

Change-Id: I791f26c94c54ce6be48116fc2eaa9e6464da5738
Merge "code styling & pep8 refactoring"
Merge "Wait for node online status"
Assert message text for only 'discover' notifications

Change-Id: I68716518663ca462b6ef187abe90a290c7b15b2e
fix for NODES_COUNT availability

Change-Id: Iaeb8d6f186aa9d61c697d9434a2fd73a45cd7774
Merge "Assert message text for only 'discover' notifications"
Merge "fix for NODES_COUNT availability"
Build CentOS repo without strict requirements to number of incorrect packets

Change-Id: I39c85006363c8a28c79428c6fd12582ace810857
Move nailgun docs to a new VM

Change-Id: Ic3b4a0d2797ee22308ba98972f6356cf7bf69daa
Merge "[vbox] Increasing memory/disk size in vbox scripts."
skip ceph tests for RHEL

Change-Id: Ida8db39c90c5193f09c877b2e15ea30637e02b05
Closes-Bug: #1261344
Add test with enabled ceilometer in deployment

Test includes:
* Deployment of simple cluster with 3 slaves
* Assert that api is running
* Run ostf tests (without revert)

Change-Id: Ib6379384902027d8eb0d76430c17ccd90a7ed101
Merge "Add test with enabled ceilometer in deployment"
Add ostf failed tests names and meesages in assert

In case if tests failed in method assert_ostf_run
there is no quick way to understand what exectly fail

Add failed_test_names variable,
that populated by failed ostf test names and error message
in assertTrue method. Value on this variable
will show only if AssertTrue fail.

Change-Id: Ib4475835c129a3240b9f3c270a3aa8de3d12a966
Add one more slave to the ceph test

To get possible instance creation in verification
add 1 slave to the ceph tests

Also change update disk value
to avaid unallocated space, because by default we
have 50 Gb on each slave

Change-Id: Ibd7ad3b38ce1e8bad3cd928047f04d4c8cc8d47e
Closes-Bug: bug #1260677
Merge "Add one more slave to the ceph test"
Remove version for python-iso8601

Update version for package python-iso8601

Change-Id: I9b553c0f588eeea3038df21753deef9f73203f6d
change netprovider in murano test

Change-Id: I637bb18775788bacb7f7a99084be4cf64c80ff2e