use airlock to fetch dependencies

Author: sakthivelmanii

.kokoro/build.sh

@@ -38,6 +38,7 @@ 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 \
+    -Pairlock-trusted \
     -DskipTests=true \
     -Dclirr.skip=true \
     -Denforcer.skip=true \