Update tests for service account support and remove deprecated UA tests

Author: ondrajodas

tests/Keboola/GoogleAnalyticsExtractor/Extractor/ExtractorTest.php

@@ -37,7 +37,7 @@ public function setUp(): void
         $this->config = $this->getConfig();
         $this->logger = new TestLogger();
         $client = new Client(
-            new RestApi(
+            RestApi::createWithOAuth(
                 (string) getenv('CLIENT_ID'),
                 (string) getenv('CLIENT_SECRET'),
                 (string) getenv('ACCESS_TOKEN'),

tests/Keboola/GoogleAnalyticsExtractor/GoogleAnalytics/ClientTest.php

@@ -25,7 +25,7 @@ public function setUp(): void
         $this->logger->pushHandler($testHandler);
 
         $this->client = new Client(
-            new RestApi(
+            RestApi::createWithOAuth(
                 (string) getenv('CLIENT_ID'),
                 (string) getenv('CLIENT_SECRET'),
                 (string) getenv('ACCESS_TOKEN'),