Revert "Add signing to Akraino deploy templates"

This reverts commit 0904fdd5e0e3b113ee90e77c646a7f156d878762.
We are seeing issues with signing very large objects (specifically,
the ISOs being pushed by TA). Until we find a solution for this,
the change needs to be reverted so that it does not cause any further
interruption to normal work.

Change-Id: Ib79b2bbc9aaca92eaf60a2a836bba5e84487ba89
Signed-off-by: Eric Ball <eball@linuxfoundation.org>