Fix authentication issue

Author: sakthivelmanii

.kokoro/build.sh

@@ -37,7 +37,7 @@ echo ${JOB_TYPE}
 
 # attempt to install 3 times with exponential backoff (starting with 10 seconds)
 retry_with_backoff 3 10 \
-  mvn install -B -V -ntp \
+  mvn install -B -V -U -ntp \
     -Pairlock-trusted \
     -DskipTests=true \
     -Dclirr.skip=true \

.mvn/extensions.xml

@@ -0,0 +1,8 @@
+<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
+  <extension>
+    <groupId>com.google.cloud.artifactregistry</groupId>
+    <artifactId>artifactregistry-maven-wagon</artifactId>
+    <version>2.2.3</version>
+  </extension>
+</extensions>