Update policy.py to have the correct import statements for lexx/yacc ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=121730590
Update policy.py to have the correct import statements for lexx/yacc
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121730590

google/capirca,ryantierney513/capirca,ryantierney513/capirca,rarcotvmw/capirca,google/capirca,sneakywombat/capirca,pettai/capirca,rarcotvmw/capirca,sneakywombat/capirca,pettai/capirca,rarcotvmw/capirca,ryantierney513/capirca,google/capirca,google/capirca,sneakywombat/capirca