Add runner logs

Author: sakthivelmanii

.kokoro/build.sh

@@ -74,7 +74,7 @@ test)
     # If we rely on certain things only available in newer JVM than Java 8, this
     # tests detect the usage.
     echo "SUREFIRE_JVM_OPT: ${SUREFIRE_JVM_OPT}"
-    mvn test -B -V \
+    mvn test -B -V -Dtest=RetryOnInvalidatedSessionTest -Dsurefire.failIfNoSpecifiedTests=false \
       -Dclirr.skip=true \
       -Denforcer.skip=true \
       -Djava.net.preferIPv4Stack=true \

google-cloud-spanner/src/test/java/com/google/cloud/spanner/RetryOnInvalidatedSessionTest.java

@@ -1750,13 +1750,16 @@ private void asyncTransactionManager_readRowFunction(
       TransactionContextFuture context = manager.beginAsync();
       while (true) {
         try {
+          System.out.println("Inside while");
           AsyncTransactionStep<Void, Struct> row =
               context.then((transaction, ignored) -> fn.apply(transaction), executor);
           CommitTimestampFuture ts = row.commitAsync();
           assertThrowsSessionNotFoundIfShouldFail(() -> get(ts));
           break;
         } catch (AbortedException e) {
           context = manager.resetForRetryAsync();
+        } catch (Exception e) {
+          System.out.println("Got exception " + e.getMessage());
         }
       }
     } finally {