upgrading google auth client

(cherry picked from commit d9f644c6)

testing/notification-test-core/pom.xml

@@ -99,7 +99,7 @@
         <dependency>
             <groupId>com.google.oauth-client</groupId>
             <artifactId>google-oauth-client</artifactId>
-            <version>1.23.0</version>
+            <version>1.34.1</version>
         </dependency>
         <dependency>
             <groupId>com.google.api-client</groupId>