Fix for the typo in vsrx.py
Fix for the typo in vsrx.py

On CI we've found the next error:

plugin_test/helpers/vsrx.py", line 103
    for i in range(10)
                          ^
Closes-Bug: #1643898
Change-Id: I2ec65f3750c615c745a55418a3e30462370d379a

stackforge/fuel-plugin-contrail,stackforge/fuel-plugin-contrail,stackforge/fuel-plugin-contrail,stackforge/fuel-plugin-contrail