Migrate checkstyle's use of self.config to self.get_options() for fetching from pants.ini.
Migrate checkstyle's use of self.config to self.get_options() for fetching from pants.ini.

The options names should be backwards compatible.  However, the task doesn't seem to be wired in to any
goal at the moment, so I can't add a section name to the migration script.

Testing Done:
CI passed.

Bugs closed: 828

Reviewed at https://rbcommons.com/s/twitter/r/1399/

pgroudas/pants,qma/pants,scode/pants,jessrosenfield/pants,digwanderlust/pants,fkorotkov/pants,sameerparekh/pants,kwlzn/pants,megaserg/pants,sameerparekh/pants,landism/pants,gmalmquist/pants,dturner-tw/pants,megaserg/pants,jtrobec/pants,gmalmquist/pants,sid-kap/pants,baroquebobcat/pants,twitter/pants,cevaris/pants,megaserg/pants,pgroudas/pants,megaserg/pants,wisechengyi/pants,foursquare/pants,tdyas/pants,mateor/pants,peiyuwang/pants,pombredanne/pants,jtrobec/pants,fkorotkov/pants,jtrobec/pants,foursquare/pants,gmalmquist/pants,jessrosenfield/pants,square/pants,15Dkatz/pants,twitter/pants,scode/pants,fkorotkov/pants,Gabriel439/pants,pgroudas/pants,benjyw/pants,ericzundel/pants,kwlzn/pants,digwanderlust/pants,landism/pants,15Dkatz/pants,scode/pants,kwlzn/pants,jtrobec/pants,sameerparekh/pants,kslundberg/pants,twitter/pants,ity/pants,pgroudas/pants,di0spyr0s/pants,pantsbuild/pants,15Dkatz/pants,TansyArron/pants,benjyw/pants,ity/pants,square/pants,pombredanne/pants,pombredanne/pants,megaserg/pants,fkorotkov/pants,manasapte/pants,tdyas/pants,landism/pants,mateor/pants,UnrememberMe/pants,jtrobec/pants,cevaris/pants,landism/pants,landism/pants,foursquare/pants,mateor/pants,tejal29/pants,twitter/pants,dgomez10/xanon,dturner-tw/pants,sid-kap/pants,wisechengyi/pants,lahosken/pants,peiyuwang/pants,dgomez10/xanon,baroquebobcat/pants,tdyas/pants,pombredanne/pants,laurentgo/pants,dgomez10/xanon,sameerparekh/pants,UnrememberMe/pants,mateor/pants,digwanderlust/pants,15Dkatz/pants,manasapte/pants,cevaris/pants,tejal29/pants,peiyuwang/pants,dgomez10/xanon,slyphon/pants,scode/pants,Gabriel439/pants,twitter/pants,dgomez10/xanon,manasapte/pants,lahosken/pants,pantsbuild/pants,Gabriel439/pants,jessrosenfield/pants,benjyw/pants,TansyArron/pants,areitz/pants,Gabriel439/pants,ity/pants,baroquebobcat/pants,fkorotkov/pants,pantsbuild/pants,qma/pants,benjyw/pants,dgomez10/xanon,UnrememberMe/pants,jessrosenfield/pants,mateor/pants,ericzundel/pants,twitter/pants,tdyas/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,slyphon/pants,laurentgo/pants,ericzundel/pants,jessrosenfield/pants,dturner-tw/pants,manasapte/pants,mateor/pants,15Dkatz/pants,dbentley/pants,baroquebobcat/pants,dbentley/pants,pombredanne/pants,wisechengyi/pants,wisechengyi/pants,ity/pants,landism/pants,baroquebobcat/pants,sameerparekh/pants,jsirois/pants,pgroudas/pants,twitter/pants,Gabriel439/pants,dbentley/pants,scode/pants,dturner-tw/pants,gmalmquist/pants,UnrememberMe/pants,baroquebobcat/pants,cevaris/pants,pgroudas/pants,gmalmquist/pants,tdyas/pants,mateor/pants,UnrememberMe/pants,tejal29/pants,baroquebobcat/pants,ity/pants,tejal29/pants,foursquare/pants,Gabriel439/pants,sameerparekh/pants,slyphon/pants,kslundberg/pants,sid-kap/pants,landism/pants,scode/pants,dgomez10/xanon,foursquare/pants,megaserg/pants,qma/pants,Gabriel439/pants,fkorotkov/pants,TansyArron/pants,qma/pants,TansyArron/pants,qma/pants,wisechengyi/pants,foursquare/pants,TansyArron/pants,laurentgo/pants,manasapte/pants,peiyuwang/pants,laurentgo/pants,square/pants,peiyuwang/pants,dturner-tw/pants,TansyArron/pants,areitz/pants,qma/pants,dbentley/pants,lahosken/pants,ericzundel/pants,cevaris/pants,dgomez10/xanon,dgomez10/xanon,baroquebobcat/pants,UnrememberMe/pants,sid-kap/pants,pantsbuild/pants,slyphon/pants,benjyw/pants,sid-kap/pants,kwlzn/pants,landism/pants,areitz/pants,dturner-tw/pants,kwlzn/pants,laurentgo/pants,kslundberg/pants,di0spyr0s/pants,scode/pants,pombredanne/pants,jtrobec/pants,sid-kap/pants,gmalmquist/pants,kwlzn/pants,ericzundel/pants,pantsbuild/pants,manasapte/pants,di0spyr0s/pants,kslundberg/pants,square/pants,ericzundel/pants,fkorotkov/pants,lahosken/pants,mateor/pants,tdyas/pants,pombredanne/pants,dgomez10/xanon,wisechengyi/pants,twitter/pants,TansyArron/pants,manasapte/pants,foursquare/pants,UnrememberMe/pants,kslundberg/pants,15Dkatz/pants,lahosken/pants,sid-kap/pants,peiyuwang/pants,fkorotkov/pants,jessrosenfield/pants,wisechengyi/pants,digwanderlust/pants,dgomez10/xanon,digwanderlust/pants,kslundberg/pants,tdyas/pants,15Dkatz/pants,lahosken/pants,foursquare/pants,tdyas/pants,ity/pants,jsirois/pants,laurentgo/pants,areitz/pants,digwanderlust/pants,jtrobec/pants,slyphon/pants,slyphon/pants,tdyas/pants,UnrememberMe/pants,twitter/pants,tejal29/pants,wisechengyi/pants,lahosken/pants,jessrosenfield/pants,ity/pants,wisechengyi/pants,15Dkatz/pants,foursquare/pants,dturner-tw/pants,UnrememberMe/pants,ericzundel/pants,baroquebobcat/pants,peiyuwang/pants,sameerparekh/pants,di0spyr0s/pants,di0spyr0s/pants,pantsbuild/pants,megaserg/pants,areitz/pants,di0spyr0s/pants,cevaris/pants,dbentley/pants,ericzundel/pants,cevaris/pants,lahosken/pants,kslundberg/pants,dbentley/pants,areitz/pants,jsirois/pants,kwlzn/pants,dbentley/pants,areitz/pants,gmalmquist/pants,peiyuwang/pants,di0spyr0s/pants,qma/pants,slyphon/pants