Rename Floonet to Testnet (#3431)

* Rename Floonet to Testnet

* Fix test

* Rename test and docker

src/bin/grin.rs

@@ -80,8 +80,8 @@ fn real_main() -> i32 {
 		.get_matches();
 	let node_config;
 
-	let chain_type = if args.is_present("floonet") {
-		global::ChainTypes::Floonet
+	let chain_type = if args.is_present("testnet") {
+		global::ChainTypes::Testnet
 	} else if args.is_present("usernet") {
 		global::ChainTypes::UserTesting
 	} else {

src/bin/grin.yml

@@ -3,9 +3,9 @@ about: Lightweight implementation of the Mimblewimble protocol.
 author: The Grin Team
 
 args:
-  - floonet:
-      help: Run grin against the Floonet (as opposed to mainnet)
-      long: floonet
+  - testnet:
+      help: Run grin against the Testnet (as opposed to mainnet)
+      long: testnet
       takes_value: false
   - usernet:
       help: Run grin as a local-only network. Doesn't block peer connections but will not connect to any peer or seed