Remove upload screen and service [1/1]

These screens are not being tested as part of our QA
and the represent potential attack vectors because
the allow users to upload files to the server.

While the function is useful, it was considered safer to 
remove them for now.

Users can still import barclamps using the /opt/dell/bin/barclamp-import
scripts.


 .../app/controllers/support_controller.rb          |  104 +--------------
 .../app/views/support/import.html.haml             |  133 --------------------
 crowbar_framework/config/navigation.rb             |    1 -
 3 files changed, 1 insertion(+), 237 deletions(-)

Crowbar-Pull-ID: beff9fe0760f0520bda376b094ae95bf2b1c9472

Crowbar-Release: pebbles