Disable pylint c-extension-no-member warning

[housengw]

After the API changes in the python target in #1116, the time API in the python target became lf.time.<function_name>.

Since lf is a c extension of python, pylint does not have python source code to reference the content of lf and complains about Module 'lf' has no 'time' member.

A temporary fix is to disable c-extension-no-member warnings globally in the generated .py file.

[lhstrh]

Seems reasonable as a stop-gap measure, but what would be a permanent look like?

[petervdonovan]

This looks right to me -- thank you! Later I may try to re-enable this feature.

[housengw]

A permanent solution would involve making the time module of reactor-c a standalone library (ex. lftime) and passing --extension-pkg-whitelist=lftime as part of the argument to pylint.