* BAEL-1418 - spring security with extra login fields
* change delimeter for username/domain concatenation
* remove unnecessary class
* move source to spring-5-security module
* finish moving example code to spring-5-security module
* fix formatting in pom
* adjust spacing
* BAEL-1418 Spring Security with Extra Login Fields
* added additional custom example
* refactored and added tests
* remove final keywords and serialVersionUID constants
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