919200 - move node level update strategy to consumer note.

https://bugzilla.redhat.com/show_bug.cgi?id=919177

- Moves --strategy from the 'node update' command to the 'node activate' command.  No longer passed in content update command options.
- Stores the node-level strategy as a note on the consumer.  We already store a note on the consumer to indicate whether the consumer is a child node or not.
- The note is retrieved by the handler during update.
- updated test cases