Add a script command to generate the XOM and ruleapp based on ODM 8.9 build command.

[stephane-mery]

we should have a script command (maven-based?) that allows to generate the ruleapp based on ODM 8.9 build command.

[stephane-mery]

The script takes the decision service source and generate a ruleapp jar and the XOM that could be deployed using cli api through the blockchain.