Bael 5407: Multitenancy with Spring Data JPA (#12507)
* BAEL-5407: add entity, repository, controller, main class
* BAEL-5407: add starter-web and postgres dependencies
* BAEL-5407: add sample script
* BAEL-5407: add tenant definition file
* BAEL-5407: add tenant filter
* BAEL-5407: add AbstractRoutingDataSource class
* BAEL-5407: add TenantContext class
* BAEL-5407: add MultitenantConfiguration class
* BAEL-5407: replace Object with String
* BAEL-5407: improve indentation
* BAEL-5407: remove printStackTrace()
* BAEL-5407: add security classes
* BAEL-5407: add security dependencies
* BAEL-5407: get Tenant from JWT token
* BAEL-5407: improve indent
* BAEL-5407: improve code quality
Co-authored-by: h_sharifi <h_sharifi@modernisc.com>
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