CAS-1292: Front Channel SLO

First commit
CAS-1292: Front Channel SLO

Don't use iterator as they are not Serializable
CAS-1292: Front Channel SLO

Be able to return the key for webflow
CAS-1292: Front Channel SLO

Fix front SLO to be able to resume webflow
CAS-1292: Front Channel SLO

Update after Marvin's, Andrew's and Misagh's code reviews
Merge pull request #264 from leleuj/CAS-1292

CAS-1292: Front Channel SLO