When using the signup-procedure (in LWA) and using email with + - the +-sign should not be stripped

[maurtvedt]

Upon testing singup at https://whydahdev.cantara.no/sso/signup
I used gmail alias feature (https://support.google.com/mail/answer/12096?hl=en) in both username and email. In username it worked fine, but in e-mail it was stripped away resulting in failed signup since I did not receive a password e-mail.

[email protected] turned into [email protected]

[totto]

in UserIdentityService:

if (dto.getEmail() != null && dto.getEmail().contains("+")) {
email = replacePlusWithEmpty(dto.getEmail());
} else {
email = dto.getEmail();
}