fix(deps): update dependency com.google.auth:google-auth-library-cred…

…entials to v1.7.0 (#1700)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.auth:google-auth-library-credentials](https://togithub.com/googleapis/google-auth-library-java) | `1.6.0` -> `1.7.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.7.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.7.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.7.0/compatibility-slim/1.6.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.7.0/confidence-slim/1.6.0)](https://docs.renovatebot.com/merge-confidence/) |

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gax-java/pom.xml

@@ -61,7 +61,7 @@
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-credentials</artifactId>
-        <version>1.6.0</version>
+        <version>1.7.0</version>
       </dependency>
       <dependency>
         <groupId>org.threeten</groupId>