chore: Run tests

Author: lqiu96

.kokoro/build.sh

@@ -146,6 +146,20 @@ integration)
       -Denforcer.skip=true \
       -fae \
       verify
+
+    repo="[email protected]:googleapis/java-bigquery.git"
+    repo_name=$(basename "${repo}" .git)
+    git clone "${repo}"
+    pushd "${repo_name}"
+    mvn install -B -V -ntp \
+        -DskipTests=true \
+        -Dclirr.skip=true \
+        -Denforcer.skip=true \
+        -Dmaven.javadoc.skip=true \
+        -Dgcloud.download.skip=true \
+        -T 1C
+    mvn clean verify -Penable-integration-tests -Dclirr.skip=true -Denforcer.skip=true
+    popd
     RETURN_CODE=$?
     ;;
 graalvm)