Retrieve the swift version with recon

Adding a '/recon/version' in order to get the swift version

Change-Id: I7b7ddbe70abb87c6a3b1010ddefa09d0acc09710
RingBuilder.add_dev returns device id

When added a new devices into builder the add_dev function returns it
unique id.

blueprint argparse-in-swift-ring-builder

Change-Id: I57080bb625e812f6cea71199df907a44b332b552
Merge "Retrieve the swift version with recon"
Made tests use a JSON parser in liue of eval.

The results that are being parsed are really JSON, so using a JSON parser is
more semantically correct; in addition using eval anywhere can set a bad
example.

Change-Id: Idcd55400b2571aba0f2f377cf66a3cbf4d3af960
Merge "RingBuilder.add_dev returns device id"