refactor: address pr comments, replace app_resources usage for whatever

the name of the app_resources directory basename is

Author: petekanev

lib/project-data.ts

@@ -152,6 +152,10 @@ export class ProjectData implements IProjectData {
 	}
 
 	private getNsConfigContent(projectDir: string): string {
+		if (!projectDir) {
+			return null;
+		}
+
 		const configNSFilePath = path.join(projectDir, constants.CONFIG_NS_FILE_NAME);
 
 		if (!this.$fs.exists(configNSFilePath)) {

test/ios-entitlements-service.ts

@@ -47,7 +47,7 @@ describe("IOSEntitlements Service Tests", () => {
 		injector = createTestInjector();
 
 		platformsData = injector.resolve("platformsData");
-		projectData = injector.resolve("projectData");
+		projectData = $injector.resolve<IProjectData>("projectData");
 		projectData.projectName = 'testApp';
 
 		projectData.platformsDir = temp.mkdirSync("platformsDir");