Fix the use of deprecated inspect.getargspec() for inspect.getfullarg…

[BoboTiG]

…spec() in netmiko_helpers.py

[coveralls]

Coverage increased (+0.01%) to 79.068% when pulling 2713482 on BoboTiG:fix-inspect-warning into aa91264 on napalm-automation:develop.

[ktbyers]

Very minor lint issue that you need to fix (that is causing the unit tests to fail).

[BoboTiG]

Good catch, done :)

[bewing]

# git grep -l getargspec
napalm/base/mock.py
napalm/base/netmiko_helpers.py
napalm/base/test/getters.py

Possibly worth moving this solution to base.util.py23 and importing it from there?

[ktbyers]

Will separately fix the use in mock.py and in getters.py