Add test on creating instance with
file injection

Change-Id: I92dfe1da854dfc662f1b8b77e85e1e295b5790e6
Related-Bug: #1335697
Fix issue with hardcoded versions for requirements

We need to build fuel images with all packages from master branch
and also we need support build from current stable version too.

Added python-babel to satisfy nailgun dependency

Change-Id: I609fe6f4185d37134842332b9d35cfcb3e2e4cb6
Closes-Bug: #1361279
blueprint fuel-deploy-juno
Return empty string instead of None (systests)

In 'execute_through_host' method return empty string if
exception is caught. This is required to avoid type errors
in tests which use that function. Also, increase log level
to 'error' for message about occurred exception.

Change-Id: I7021ee90e32f39b2183b7693d3ba6fe4c669517d
Closes-bug: #1369962
Merge "Return empty string instead of None (systests)"
Merge "Add test on creating instance with file injection"
Remove bvt group from neutron ha vlan test
with public network

Change-Id: I851167b82301743083c528f14b94b45d944e27fb
Closes-Bug: #1376241
Merge "Fix issue with hardcoded versions for requirements"
Building OS images centos and ubuntu

Those images are supposed to be used for
image based provisioning. This patch set
needs python-imgcreate package to be available.

Implements: blueprint image-based-provisioning
Change-Id: I4f038c99d4caf7d2b6e291bff29572b3a45d92c7