son-monitor: update monitor REST API

[stevenvanrossem]

include {vnf_interface}, {metric}, {cookie} in the JSON data, iso in the URL:
/monitor/{vnf_name} /{vnf_interface} /{metric}/{cookie}

it is more simple and easier to extend when only using 1 URL for the monitoring REST API:
/monitor/{vnf_name}

[mpeuster]

This is done, right?

[stevenvanrossem]

The monitor REST API is now structured like this:
/restapi/monitor/interface/<vnf_name>/<vnf_interface>//
/restapi/monitor/flow/<vnf_name>/<vnf_interface>//
/restapi/monitor/link/<vnf_src_name>/<vnf_dst_name>

I still need to implement it differently in Flask in son-emu:
all parameters <vnf_name>, <vnf_interface>,... should be included as parameter in the url:
e.g. /restapi/monitor/interface?vnf_name=value1&vnf_interface=value2&...
I learned that Flask can easily do this, this also seems more REST-compliant and easier to document

[stevenvanrossem]

this is done. e89e5e4
I started a wiki page to keep track of the current REST api status: REST api