Better handling of contextual parameters

Contextual parameters are now automatically replaced based on the value of the parameter that should look like "${PARAMETER}", and not anymore on the parameter name.
For instance, with the following parameter:
myParameter => ${currentWorkspaceId}
when rendering the report, the value of "myParameter" will be the ID of the first parent Workspace of the Report.

Available contextual parameters:
${userName}
${docType}
${currentPath}
${currentRepository}
${currentSuperSpacePath}
${currentSuperSpaceId}
${currentWorkspacePath}
${currentWorkspaceId}
${currentDomainPath}
${currentDomainId}