Update directory structure related to hello module.
- Previously, automation scripts related to hello module were stored
under the Scripts/Modules/Hello directory and their related
documentation files at Documentation directory. This organization
seems to be inappropriate when building rpm packages. In order to
provide a better organization, this update moves automation scripts
related to hello module from Scripts/Modules/Hello directory to
tcar-scripts-hello directory and the related documentation files
from Documentation to tcar-scripts-hello-docs directory.