roles/amarisoft-upgrade: add role to upgrade amarisoft binaries

This role makes a request to shacache to check if new amarisoft
binaries are available. If there are and if the license on the
machine allows it the binaries will be downloaded and decrypted
using the server's private key in /opt/private-key.
The binaries will then be installed in
/opt/amarisoft/vYYYY-MM-DD, to be used with ors-amarisoft
software release.