Update JJB Sandbox

Update JJB Sandbox

- Build status message includes a link back to the sandbox
- The deploy job now includes references to required macros (similar to
  'verify')
- Wrappers are removed by setting 'wrappers' to the empty string. This
  is due to the 'ssh-agent' credentials not being used nor existing on
  the sandbox server.
- Shebang lines have been fixed to remove the space after '#!' causing
  the Java 'Cannot run program' error.
- Jobs are restricted to the 'releng-sandbox' label so they aren't
  triggered on 'master'
- Remove 'utils' directory from triggering builds.
- Sandbox deployment doesn't vote on any builds, this should help should
  the job again somehow run against non-sandbox changes.
- 'releng-clear-sandbox-jobs' replaced with '--delete-old' on update so
  that each patchset submitted will remove any previously deployed jobs.

Change-Id: I4f37dbb0c0becc5760c826950306e9d958a40aaa
Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>