Update JS unit test libs

Update sinon to 1.15.4.
Update karma-jasmine to 0.3.0
Update jasmine to 2.3.4

This brings a bunch of new useful functions for unit testing.

build/package.json

@@ -1,22 +1,23 @@
 {
-        "name": "owncloud-js-tests",
-        "description": "ownCloud tests",
-        "version": "0.0.1",
-        "author": {
-                "name": "Vincent Petry",
-                "email": "pvince81@owncloud.com"
-        },
-        "private": true,
-        "homepage": "https://github.com/owncloud/",
-        "contributors": [],
-        "dependencies": {},
-        "devDependencies": {
-                "karma": "~0.12.0",
-                "karma-jasmine": "~0.2.0",
-                "karma-junit-reporter": "*",
-	            "karma-coverage": "*",
-                "karma-phantomjs-launcher": "*",
-                "phantomjs": "*"
-        },
-        "engine": "node >= 0.8"
+  "name": "owncloud-js-tests",
+  "description": "ownCloud tests",
+  "version": "0.0.1",
+  "author": {
+    "name": "Vincent Petry",
+    "email": "pvince81@owncloud.com"
+  },
+  "private": true,
+  "homepage": "https://github.com/owncloud/",
+  "contributors": [],
+  "dependencies": {},
+  "devDependencies": {
+    "karma": "~0.12.0",
+    "karma-jasmine": "~0.3.0",
+    "karma-junit-reporter": "*",
+    "karma-coverage": "*",
+    "karma-phantomjs-launcher": "*",
+    "phantomjs": "*",
+    "jasmine-core": "~2.3.4"
+  },
+  "engine": "node >= 0.8"
 }

tests/karma.config.js

@@ -121,7 +121,7 @@ module.exports = function(config) {
 	}
 
 	// extra test libs
-	files.push(corePath + 'tests/lib/sinon-1.7.3.js');
+	files.push(corePath + 'tests/lib/sinon-1.15.4.js');
 
 	// core mocks
 	files.push(corePath + 'tests/specHelper.js');