tf: fly sync copy of fly binary
tf: fly sync copy of fly binary

If we fly sync within the test, it actually affects the fly binary that
is possibly used by multiple tests because it points to the same path.
The test is changed to create a new fly binary for the fly sync test in
order to avoid that.

Signed-off-by: Clara Fu <d5c8bdbc15689555c92563892e959c79b3fc425f@pivotal.io>
Co-authored-by: Alex Suraci <925ba519bbf1a06224928b692ef88b93aee946af@gmail.com>
Signed-off-by: Clara Fu <d5c8bdbc15689555c92563892e959c79b3fc425f@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse