Moves labs section to basic-install-guide folder

Moves installation section under training labs (install guides) to
basic-install-folder. To make it clear, basic-install-guide folder will only
contain installation specific XML files, theory will still lie under the
respective books.

Change-Id: I86628a62579df5c294cac165b4b2d681e3b225e6
Implements: blueprint separate-folders-for-books