Jenkins build server: Generate hosted scene service definition json file

Need to generate json file that stores the scene service definitions. During the build process, execute the Utilties\WriteHostedSceneServiceDefinitions.py script for all the Demo and Released users (NOTE: for user conference this will need to be executed for all users).

A separate file is created for each scene service. The script parameters have you specify the path to a folder to store the files. Create a folder named OPSServerInstall\Portal\SceneServiceDefs

Start by reading Utilities\WriteHostedSceneServiceDefinitions.py and inspecting the Jenkins build configuration that invokes it. Configure the build to generate definitions for Demo and Released users, writing separate files under OPSServerInstall\Portal\SceneServiceDefs; verify the expected files are produced.

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