In autocommit, read requests that are broadcasted should be scheduled using a 
fake transaction id
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         Key: SEQUOIA-823
         URL: https://forge.continuent.org/jira/browse/SEQUOIA-823
     Project: Sequoia
        Type: Bug
    Versions: Sequoia 2.10.1, Sequoia 2.10, Sequoia 2.9    
    Reporter: Stephane Giron
 Assigned to: Stephane Giron 
     Fix For: Sequoia 2.10.2, Sequoia 3.0 beta1


This transaction id is used when locking.
If an autocommit "read" request is broadcasted (select ... for update, for 
example), we need to lock some tables.
If requests have no transaction id set, they could run in parallel, as their 
transaction id is considered as the same ( == 0 ).

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