[CP-7448] Remove device_id modification logic from tools installer

No need to change device id under any circumstances
No need to update nsis installer under usual circumstances
NSIS installer is updated if NSIS drivers are still found to be
  installed, but an uninstaller isn't found

Signed-off-by: Ben Chalmers <Ben.Chalmers@citrix.com>
Merge pull request #36 from benchalmers/cp-7448

[CP-7448] Remove device_id modification logic from tools installer