CI: Fix contract_tests about gaia HOT 2 CLOSED

That's good! the goal of this test was to catch this kind of things.

The tar -xzf lcd_test/testdata/state.tar.gz -C /tmp/contract_tests/ command is completely overriding the .gaiad directory which is wrong.

Luckily that command does not override everything, only files that match their path:
in /tmp/contract_tests/.gaiad/config/:

• addrbook.json
• config.toml
• genesis.json
• gentx
• node_key.json
• priv_validator_key.json

If you try to launch locally the untar command you will see what's inside, some accounts in gaiacli and a validator with his private key in gaiad + a genesis

By changing the config.toml inside the state.tar.gz works, I ran a diff between the two configurations and the only meaningful difference is:

< db_backend = "goleveldb" # new version
---
> # Database backend: leveldb | memdb | cleveldb
> db_backend = "leveldb" # old version

The reason why the config.toml is here is to speed up the tests by reducing the timeouts, if you prefer we can achieve this with a few sed commands and keep generated config.toml

< timeout_propose = "3s"
< timeout_propose_delta = "500ms"
< timeout_prevote = "1s"
< timeout_prevote_delta = "500ms"
< timeout_precommit = "1s"
< timeout_precommit_delta = "500ms"
< timeout_commit = "5s"
---
> timeout_propose = "200ms"
> timeout_propose_delta = "200ms"
> timeout_prevote = "500ms"
> timeout_prevote_delta = "100ms"
> timeout_precommit = "200s"
> timeout_precommit_delta = "200ms"
> timeout_commit = "500ms"

from gaia.

Just made a PR for that, I just removed the config.toml from the targz and added few sed to achieve the speedup, the tests itself seems happy again: https://circleci.com/gh/cosmos/gaia/2637

from gaia.