Fix for CAS-1412
CAS-1412: web session terminated at end of subflow
Added code to check flowsession for root before setting maxInactiveInterval.
CAS-1412: web session terminated at end of subflow
Added code to check flowsession for root before setting maxInactiveInterval.
Merge pull request #384 from lucastheisen/CAS-1412

CAS-1412:  web session terminated at end of subflow