Upsert doesn't work in case backend endpoint is changed

[flaviostutz]

After an API is created (via "sls deploy"), if we change apidefs.[].backend.http.baseUrl in configuration, WSO2 API configuration isn't changed (the previous version is kept) when doing "sls deploy" for upserting.

Steps to reproduce

• Deploy an API via sls deploy
• Check the endpoint url on WSO2 console
• Change baseUrl in plugin configuration to something else
• Deploy API again via sls deploy
• Change endpoint url on WSO2 console (should be the same as in the first deploy)

The workaround that I use is to delete the API and re-create again with "sls deploy"

[ramgrandhi]

@flaviostutz - can you test if it still persists with the latest version? It helps to prioritise this issue. Thanks for reporting!