Update how to install bosh cli gems.

[#55610004]

Signed-off-by: Jeffrey Peckham <peckham@pivotallabs.com>
Don't send the agent job/index info during create missing vm stage

The job/index and release information is sent to the agent in 'Binding
instance VMs' stage along with updating the associations in the
database.

Signed-off-by: Jon Stevens <jstevens@pivotallabs.com>