Jonas/127 replace all panics by fatal error

• Création d'un commite par crate
• Dans lib/core/conf ajout de commentaire pour les fonction ne pouvant pas utiliser la macro fatal_error car le logger n'est pas encore initialisé.
• Donc les seuls endroits où la macro panic! est encore utilisé:
  • avant l'initialisation du logger (donc la macro fatal_error 😄).
  • dans les tests (unitaire et intégration)
  • dans la crate lib/core/core car dev en cours https://git.duniter.org/nodes/rust/duniter-rs/tree/elois/ref-core-starter

$ grep -nR "panic\!(" lib | grep -v "lib/core/core"
lib/core/conf/src/lib.rs:428:        KeysAlgo::Schnorr => panic!("Schnorr algo not yet supported !"),
lib/core/conf/src/lib.rs:474:            None => panic!("Impossible to get user config directory !"),
lib/core/conf/src/lib.rs:481:            panic!(
lib/core/conf/src/lib.rs:582:                                panic!("Fatal error : keypairs file wrong format : no field salt !")
lib/core/conf/src/lib.rs:585:                            panic!("Fatal error : keypairs file wrong format : no field password !")
lib/core/conf/src/lib.rs:594:                        panic!("Fatal error : keypairs file wrong format : no field salt !")
lib/core/conf/src/lib.rs:597:                    panic!("Fatal error : keypairs file wrong format : no field password !")
lib/core/conf/src/lib.rs:600:                panic!("Fail to read keypairs file !");
lib/core/conf/src/lib.rs:603:            panic!("Fail to open keypairs file !");
lib/core/conf/src/lib.rs:612:            panic!(dbg!("Fatal error : fail to write default keypairs file !"))
lib/core/conf/src/lib.rs:632:                        panic!(dbg!("Fatal error : fail to write conf file !"))
lib/core/conf/src/lib.rs:637:                panic!("Fail to read conf file !");
lib/core/conf/src/lib.rs:640:            panic!("Fail to open conf file !");
lib/core/conf/src/lib.rs:646:            .unwrap_or_else(|_| panic!(dbg!("Fatal error : fail to write default conf file!")));
lib/core/conf/src/lib.rs:663:            .unwrap_or_else(|_| panic!(dbg!("Fatal error : fail to deserialize keypairs !")))
lib/core/conf/src/lib.rs:711:        None => panic!("Impossible to get your home dir!"),
lib/tools/common-tools/src/lib.rs:42:        panic!($msg);
lib/tools/common-tools/src/lib.rs:46:        panic!($msg);
lib/tools/common-tools/src/lib.rs:50:        panic!($fmt, $($arg)+);
lib/tools/rules-engine/src/lib.rs:301:            panic!("Rule creation must be fail")
lib/tools/network-documents/src/network_head_v3.rs:249:            panic!("fail to sign head v3 : {:?}", sign_result.err().unwrap())
lib/tools/network-documents/src/network_peer.rs:324:            panic!("fail to sign peer card : {:?}", sign_result.err().unwrap())
lib/modules/ws2p/ws2p-messages/lib.rs:236:                panic!(
lib/modules/ws2p/ws2p-messages/lib.rs:242:            panic!(
lib/modules/ws2p/ws2p/tests/connection_negociation.rs:125:        panic!("Not receive client controller sender");
lib/modules/ws2p/ws2p/tests/connection_negociation.rs:146:        panic!("Not receive server controller sender");
lib/modules/ws2p/ws2p/tests/connection_negociation.rs:181:        panic!("Receive unexpected state: {:?} !", new_state);
lib/modules/ws2p/ws2p/tests/connection_negociation.rs:183:        panic!("Expect signal ChangeConnectionState, receive other !");
lib/modules/ws2p/ws2p/src/controllers/incoming_connections/mod.rs:95:                panic!("Listen error: {}", e);