public static synchronized int getUniqueKey() {
    keyFld = keyFld + 5;
    return keyFld;
  }
This is thread class The objective of this thread class is to implement the inserts and rollback
This thread will be called from TxnManagerMultiThreadDUnitTest.java This is to test the
concurrent execution of the run method and see if transaction manager handles it properly
geode-core/src/distributedTest/java/org/apache/geode/internal/jta/dunit/RollbackThread.java