Fixed the way of finding the padding

[xmartinez15]

From what i have been testing, padding is usually 6 or 7 now, so the access token cannot be parsed anymore. Anyway, i think it's better to adopt a safer solution like looking for all possible padding values (1 to 16).

[philpotisk]

@xmartinez15 Thanks for fixing this issue, before we even recorded it 😅
As a matter of fact, the problem was only visible after manually enabling the integration test EssifCommandTest by adding the bearer token to file data/ebsi/bearer-token.txt.
By doing so, I could verify that your fix is working fine 👍