Update Mery article when Pull Request #20 is done.

[Jeremy-Pichon]

Pull Request Link: #20.
Link to the article : article

• [[ CATEGORY ]] : [[ ELEMENT ]]
• Smart contracts : Second picture show "Odm-deployer". Should be modified to remove this element.
• Topology of a ... : Reference of "Deployer Servive". Usage is now hidden, should we still explain it ?
• Topology of a ... : Sub-category: Deploying the IBM ODM Rule Execution Server
• Call to Decision. : 2nd block of code: change var 'url' value.