Extract versions that contains dashes

The version extraction assumed that the version is everything after the
last `-` in the container name. This doesn't work if you deploy a
non-MRSK generated version that contains a `-`.

To fix we'll generate the non version prefix and strip it off. In some
places for this to work we need to make sure to pass the role through.

Fixes: https://github.com/mrsked/mrsk/issues/402

lib/mrsk/commands/app.rb

@@ -112,8 +112,7 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
   def list_versions(*docker_args, statuses: nil)
     pipe \
       docker(:ps, *filter_args(statuses: statuses), *docker_args, "--format", '"{{.Names}}"'),
-      %(grep -oE "\\-[^-]+$"), # Extract SHA from "service-role-dest-SHA"
-      %(cut -c 2-)
+      %(while read line; do echo ${line##{service_role_dest}-}; done) # Extract SHA from "service-role-dest-SHA"
   end
 
   def list_containers
@@ -160,6 +159,10 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       argumentize "--filter", filters(statuses: statuses)
     end
 
+    def service_role_dest
+      [config.service, role, config.destination].compact.join("-")
+    end
+
     def filters(statuses: nil)
       [ "label=service=#{config.service}" ].tap do |filters|
         filters << "label=destination=#{config.destination}" if config.destination