bf(VLTCLT-67): Fix validation and add unit tests

[tmacro]

The validation in update/deleteAccountAttributes contains an extra set of () causing the expression to always eval to true;

[bert-e]

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[tmacro]

/approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/8.5

The following branches have NOT changed:

• development/6.4
• development/7
• development/7.10
• development/7.4
• development/8.2
• development/8.3
• development/8.4

This pull request did not target the following hotfix branch(es) so they
were left untouched:

• hotfix/7.10.0
• hotfix/7.4.4
• hotfix/7.4.5
• hotfix/7.8.0
• hotfix/7.4.3
• hotfix/7.7.0
• hotfix/7.10.2
• hotfix/7.4.7
• hotfix/7.10.8
• hotfix/7.10.13
• hotfix/7.4.2
• hotfix/7.10.3
• hotfix/7.9.0
• hotfix/7.4.6
• hotfix/7.6.0
• hotfix/7.4.1
• hotfix/7.4.9
• hotfix/6.4.7
• hotfix/7.10.1
• hotfix/7.10.4
• hotfix/7.2.0
• hotfix/7.4.10
• hotfix/7.4.8
• hotfix/7.4.0

Please check the status of the associated issue VLTCLT-67.

Goodbye tmacro.

The following options are set: approve