Fix hang on missing/wrong Factorio version

Fix the start command hanging if the configured Factorio version for the
instance started is not available on the slave.

packages/slave/slave.js

@@ -315,7 +315,12 @@ class Instance extends libLink.Link {
 
 	async init(pluginInfos) {
 		this.notifyStatus("starting");
-		await this.server.init();
+		try {
+			await this.server.init();
+		} catch (err) {
+			this.notifyExit();
+			throw err;
+		}
 
 		// load plugins
 		for (let pluginInfo of pluginInfos) {

test/integration/clusterio.js

@@ -173,6 +173,16 @@ describe("Integration of Clusterio", function() {
 		});
 
 		describe("instance start", function() {
+			it("should not hang if factorio version does not exist", async function() {
+				slowTest(this);
+				try {
+					await execCtl("instance config set 44 factorio.version 0.1.2");
+					await assert.rejects(execCtl("instance start test"));
+
+				} finally {
+					await execCtl("instance config set 44 factorio.version latest");
+				}
+			});
 			it("starts the given save", async function() {
 				slowTest(this);
 				await execCtl("instance start test --save world.zip");