Multiple request management

[SaiVarunVaranasi]

Manage multiple requests sent to the SimaPro. If a new request is sent to SimaPro for the same product before the calculation data for a previous request is received. SimaPro returns an error with status code:502. We get a 502 popup alert at present for this error.

Steps to Reproduce the error:

Method 1:
Send one calculation request. Refresh(F5) the front end page (i.e it will log you out) before the calculation request is received. Then try sending another Calculation request. This should mostly reproduce the issue.

Method 2:
Send a calculation request for Service ABC. Go back to the dashboard before the calculation result is received and immediately send another request for the same product before the previous calculation result is received. This also should reproduce this error.

Note: The requests should be sent back to back without waiting for the calculation result