Merge pull request #336 from ajkannan/update-oauth-libs

Update auth dependency

Author: aozarov

gcloud-java-core/pom.xml

@@ -20,12 +20,12 @@
     <dependency>
       <groupId>com.google.auth</groupId>
       <artifactId>google-auth-library-credentials</artifactId>
-      <version>0.1.0</version>
+      <version>0.3.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.auth</groupId>
       <artifactId>google-auth-library-oauth2-http</artifactId>
-      <version>0.1.0</version>
+      <version>0.3.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.http-client</groupId>