cat_recovery.json now cat_recovery.txt

Changes `cat_recovery.json` to `cat_recovery.txt`, as it is not JSON-structured data. This also makes both echo statements match as `_cat/recovery`.
Adding the target node to the output name

Also modifies the debug output to clarify the ES host and port, as well as the  node name that is used.
Merge pull request #18 from pickypg/feature/node-name-in-output-9

Adding the target node to the output name