Mongo update is piggybacking on delete

[pradeeban]

Some example queries as of now:
For delete:
curl -X "DELETE" http://localhost:9099/services/mongo/updatemongo/delete/delete

For update:
curl -X "DELETE" http://localhost:9099/services/mongo/updatemongo/delete/update

The update API should be fixed as below.

curl -X "PUT" http://localhost:9099/services/mongo/updatemongo/update/update

The front ends should be fixed to separate DELETE and PUT. Currently, they are described as "PUT/DELETE".

[tushar-97]

@pradeeban I will pick up this issue

[pradeeban]

That's great, @tushar-97. You can work on your fork and send a pull request when it is ready for review.