Adjust some nodeos log levels to be better aligned with ours

(split task from #22 ) Now that nodeos maps it's warning to zap level, it's annoying to have them by default.

Previous suggestion: We should probably try to tweak it to have ERROR only
New suggestion: What if we took the most common "warning" logs and (in a nice hard-coded regex fashion), toned them down to "info" ?

This is open for discussion..

$ ./dfuseeos start
Starting dfuse for EOSIO with config file './dfuse.yaml'
Launching applications: abicodec,apiproxy,blockmeta,dashboard,dgraphql,eosq,eosws,fluxdb,merger,mindreader,node-manager,relayer,search-archive,search-indexer,search-live,search-router,trxdb-loader
Your instance should be ready in a few seconds, here some relevant links:

  Dashboard:        http://localhost:8081

  Explorer & APIs:  http://localhost:8080
  GraphiQL:         http://localhost:8080/graphiql

warn  2020-05-08T21:58:27.856 thread-0  controller.cpp:583            startup              ] No existing chain state or fork database. Initializing fresh blockchain state and resetting fork database (log_plugin/to_zap_log_plugin.go:53)
warn  2020-05-08T21:58:27.857 thread-0  controller.cpp:452            initialize_blockchai ] Initializing new blockchain with genesis state (log_plugin/to_zap_log_plugin.go:53)
Cannot find latest snapshot, will replay from blocks.log (nodeos/snapshot.go:153)
warn  2020-05-08T21:58:28.699 thread-0  platform_timer_accurac:64     compute_and_print_ti ] Checktime timer accuracy on this platform and hardware combination is poor; accuracy of subjective transaction deadline enforcement will suffer (log_plugin/to_zap_log_plugin.go:53)
warn  2020-05-08T21:58:28.706 thread-0  controller.cpp:583            startup              ] No existing chain state or fork database. Initializing fresh blockchain state and resetting fork database (log_plugin/to_zap_log_plugin.go:53)
warn  2020-05-08T21:58:28.706 thread-0  controller.cpp:452            initialize_blockchai ] Initializing new blockchain with genesis state (log_plugin/to_zap_log_plugin.go:53)

dfuse-io / dfuse-eosio

Adjust some nodeos log levels to be better aligned with ours #25