[router-table] rename loop variables in UpdateAllocation() (#3453)
[router-table] rename loop variables in UpdateAllocation() (#3453)


erja-gp/openthread,srickardti/openthread,openthread/openthread,lanyuwen/openthread,bukepo/openthread,bukepo/openthread,srickardti/openthread,bukepo/openthread,turon/openthread,abtink/openthread,srickardti/openthread,erja-gp/openthread,erja-gp/openthread,chshu/openthread,jwhui/openthread,lanyuwen/openthread,librasungirl/openthread,lanyuwen/openthread,turon/openthread,jwhui/openthread,openthread/openthread,abtink/openthread,chshu/openthread,librasungirl/openthread,lanyuwen/openthread,erja-gp/openthread,bukepo/openthread,openthread/openthread,lanyuwen/openthread,erja-gp/openthread,jwhui/openthread,chshu/openthread,turon/openthread,turon/openthread,jwhui/openthread,chshu/openthread,librasungirl/openthread,chshu/openthread,erja-gp/openthread,chshu/openthread,abtink/openthread,librasungirl/openthread,srickardti/openthread,openthread/openthread,abtink/openthread,lanyuwen/openthread