Create test_f5_ltm.py [Unit Testing for F5]

$ py.test test_F5_ltm.py 
================================================= test session starts ==================================================
platform darwin -- Python 2.7.5 -- py-1.4.26 -- pytest-2.6.4
collected 5 items 

test_F5_ltm.py .....

=============================================== 5 passed in 8.63 seconds ============================================