Allow overriding startup options in Zotero.reinit()

And use it in resetDB() test support function, mainly to allow
skipBundledFiles for resetDB calls. Translator installation and
initialization can take a long time, but tests that need a clean DB
don't necessarily rely on translators. Without this, running resetDB()
in beforeEach() for many tests is prohibitively slow.

components/zotero-service.js

@@ -186,13 +186,16 @@ ZoteroContext.prototype = {
 	 * then reinitializes Zotero. Returns a promise that is resolved
 	 * when this process completes.
 	 */
-	"reinit":function(cb, isConnector) {
+	"reinit":function(cb, isConnector, options = {}) {
 		Services.obs.notifyObservers(zContext.Zotero, "zotero-before-reload", isConnector ? "connector" : "full");
 		return zContext.Zotero.shutdown().then(function() {
 			return cb ? cb() : false;
 		}).finally(function() {
 			makeZoteroContext(isConnector);
-			zContext.Zotero.init(zInitOptions);
+			var o = {};
+			Object.assign(o, zInitOptions);
+			Object.assign(o, options);
+			zContext.Zotero.init(o);
 		});
 	}
 };

test/content/support.js

@@ -366,13 +366,16 @@ var getTempDirectory = Zotero.Promise.coroutine(function* getTempDirectory() {
 /**
  * Resets the Zotero DB and restarts Zotero. Returns a promise resolved
  * when this finishes.
+ *
+ * @param {Object} [options] - Initialization options, as passed to Zotero.init(), overriding
+ *                             any that were set at startup
  */
-function resetDB() {
+function resetDB(options = {}) {
 	var db = Zotero.getZoteroDatabase();
 	return Zotero.reinit(function() {
 		db.remove(false);
 		_defaultGroup = null;
-	}).then(function() {
+	}, false, options).then(function() {
 		return Zotero.Schema.schemaUpdatePromise;
 	});
 }