kytos reload napps makes mef_eline list of circuits inconsistent

[italovalcy]

Dear folks,

When we use kytos reload napps kytos/mef_eline the list of circuits in mef_eline seems to become inconsistent: you can get a circuit, you can get more information about that circuit, but you cannot remove it (returns 404 / Not Found)

Steps to reproduce:

1. Create a basic scenario with kytos and mininet (kytos and napps from master branch):

mn --topo single,2 --controller=remote,ip=127.0.0.1

2. Create an EVC:

ID=788; curl -X POST -H 'Content-type: application/json' http://127.0.0.1:8181/api/kytos/mef_eline/v2/evc/ -d "{\"name\": \"evc $ID\", \"enabled\": true, \"dynamic_backup_path\": true, \"uni_a\":{\"interface_id\":\"00:00:00:00:00:00:00:01:15\",\"tag\":{\"tag_type\":1,\"value\":$ID}},\"uni_z\":{\"interface_id\":\"00:00:00:00:00:00:00:01:16\",\"tag\":{\"tag_type\":1,\"value\":$ID}}}"

3. Reload Kytos mef_eline napp:

kytos napps reload kytos/mef_eline

4. Get information about the recently created EVC:

curl -s http://127.0.0.1:8181/api/kytos/mef_eline/v2/evc/e089ef8d7d4746

5. Try to delete the EVC:

curl -X DELETE http://127.0.0.1:8181/api/kytos/mef_eline/v2/evc/e089ef8d7d4746

Expected result: the EVC should be deleted

Actual result: {"code":404,"description":"circuit_id e089ef8d7d4746 not found","name":"Not Found"}

This seems to be happening because the way the GET method get the list of circuits is different from the way the DELETE method does:

https://github.com/kytos/mef_eline/blob/master/main.py#L87

https://github.com/kytos/mef_eline/blob/master/main.py#L235