Adding caching to python driver for #5614
Adding caching to python driver for #5614

OTS by @grey

bpradipt/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,catroot/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,bchavez/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,bchavez/rethinkdb,grandquista/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,catroot/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,bpradipt/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,bchavez/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb