deployment: extend the shutdownDeployment to also check for a shutdownDeployment program

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
deployment: fixed shutdown ready check

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
Merge pull request #14 from orocos-toolchain/fix-depl-script-shutdown

deployment: extend the shutdownDeployment to also check for a shutdownDeployment program