Remove explicit use of "SET IDENTITY_INSERT jhi_user ON/OFF" for mssql

[DanielFran]

Related with #15264 and liquibase update to 4.4.0+

See:
liquibase/liquibase-mssql#41
liquibase/liquibase-mssql@0c2b40c

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• All continuous integration tests are green
• Tests are added where necessary
• The JDL part is updated if necessary
• jhipster-online is updated if necessary
• Documentation is added/updated where necessary
• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

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[atomfrede]

This still requires the update to 4.4.0 is that correct?

generator-jhipster/generators/generator-constants.js

Line 39 in 8b29165

const LIQUIBASE_VERSION = '4.3.5';

[DanielFran]

@atomfrede Yes, forget to include the dependency update in the generator... :P