adding docstrs to _render_filenames
add unit tests for salt/modules/cp.py
pylint fixes
Merge pull request #17281 from s0undt3ch/develop

Merge branch '2014.7' forward into develop
Merge pull request #17287 from jfindlay/jmoney/cp_test

unit tests for the cp execution module
Merge branch '2014.7' into develop