CAS-1292: Front Channel SLO

Change core with one LogoutManager and servicesManager used by it
Merge remote-tracking branch 'upstream/master' into CAS-1292
CAS-1292: Front Channel SLO

Update source code according to Misagh's and Marvin's reviews
Merge remote-tracking branch 'upstream/master' into CAS-1292
CAS-1292: Front Channel SLO

Updates according to Misagh's and Scott's code reviews
Merge pull request #248 from leleuj/CAS-1292

CAS-1292: Front Channel SLO