properly pass along negate_match arg in file.sed state

fixes pylint warning:
    salt/states/file.py:1582: [W0613(unused-argument), sed] Unused argument 'negate_match'
fixup for 487203d60e90edaf784ed7b4219186fd728a5b44
also, switch to using keyword arguments due to large number of arguments involved
Merge pull request #7330 from hulu/sed-state-negate-match-fix

properly pass along negate_match arg in file.sed state