REGISTER: Attempt to register two accounts in the same web browser session fails

[ovesemart]

Description of issue:

Attempt to register two accounts in the same web browser session fails. This is scenario is added in auto test case_91.
Steps to reproduce:
Register one account, at register completed page - click att log in link but at log in page press the "Register" button and try to register a new account.

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Potential fix:

I would suggest that a new session is created when pressing the "Register" button at all times.