add python3.4 support for horizon tests

Registered by lokesh s

Make the unit tests be compatible with both python2.7 and python3.4.
Create Py34, py34dj17 envs for running tests.

Blueprint information

Status:
Complete
Approver:
David Lyle
Priority:
Undefined
Drafter:
lokesh s
Direction:
Needs approval
Assignee:
lokesh s
Definition:
Superseded
Series goal:
None
Implementation:
Beta Available
Milestone target:
None
Started by
lokesh s
Completed by
Rob Cresswell

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