Build & deployment improvements

Added writing metadata w/deployment id
Fixed rsync args to sync the deployment dir to the child
Fixed rsync args to sync the by-id symlink to the child
Don't stop gear at the beginning of activate unless it's started
Added scale up --init support to activate
Updated bash sdk file syncing code to sync app-deployments,
app-dependencies, and the app-root/runtime/repo symlink
Build & deployment improvements

Added missing comma
Now printing output from child gear activation