[Integrated] RFR: Add HostUserDetails::email

[Erik Helin]

Changeset: 4c469bf0
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-02-14 10:52:30 +0000
URL:       https://git.openjdk.java.net/skara/commit/4c469bf0

Add HostUserDetails::email

Reviewed-by: rwestberg

! forge/src/main/java/org/openjdk/skara/forge/github/GitHubHost.java
! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabHost.java
! host/src/main/java/org/openjdk/skara/host/HostUser.java