Some SDKv2 tests fail randomly

[aaitor]

Describe the bug

Some tests fails from time to time with timeout issues:

Claim aborted agreements End-to-End
       As a user I want to buy a NFT with a timeout
         I can not get the NFT after timeout so I claim back my funds:
     Error: Timeout of 300000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/home/runner/work/sdk-js/sdk-js/integration/nevermined/ClaimPaymentAbortedAgreement.test.ts)
      at createTimeoutError (/home/runner/work/sdk-js/sdk-js/node_modules/mocha/lib/errors.js:498:15)
      at Test.Runnable._timeoutError (/home/runner/work/sdk-js/sdk-js/node_modules/mocha/lib/runnable.js:431:10)
      at Timeout.<anonymous> (/home/runner/work/sdk-js/sdk-js/node_modules/mocha/lib/runnable.js:246:24)
      at listOnTimeout (node:internal/timers:569:17)
      at processTimers (node:internal/timers:512:7)

Running the time different times make tests to fail by a timeout in a different test.

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