bump to jclouds 1.6.2
synch when assigning ports on SSH machines, to prevent race/conflicts
tidy, and allow Map.copyOf(null) to return an empty map (which i think is the common use case)
include both createNode impls in the call path in case either is overridden
remove no-longer-needed special case for jclouds google compute
remove the "Delete" option in the main view, as it just confuses (doesn't delete the app, just forgets it in the browser)
tweak web example sql so it is more portable
Merge pull request #987 from ahgittin/misc

minor tidies for 0.6.0-rc's