Call "Optional#isPresent()" before accessing the value in PortalClient

- Fixed unchecked instances of Optional
- Added a comment describing my understanding of the intent of
the areUserRolesChanged method

Issue-ID: SDC-3101
Signed-off-by: Neil Derraugh <neil.derraugh@yoppworks.com>
Change-Id: I7328fc291df62ad9a4789a5640fc3cb46418bdd5
Signed-off-by: sebdet <sebastien.determe@intl.att.com>
3 files changed