gax-java to rely on existng auth library

Author: suztomo

sdk-platform-java/gax-java/pom.xml

@@ -55,22 +55,22 @@
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-credentials</artifactId>
-        <version>1.44.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
+        <version>1.43.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-oauth2-http</artifactId>
-        <version>1.44.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
+        <version>1.43.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-appengine</artifactId>
-        <version>1.44.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
+        <version>1.43.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-cab-token-generator</artifactId>
-        <version>1.44.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
+        <version>1.43.0</version><!-- {x-version-update:google-auth-library-parent:current} -->
       </dependency>
       <dependency>
         <groupId>org.threeten</groupId>