First commit with work so far on DUM HA implementation.
The purpose of this project is to make DUM dialog-related data persistent and make DUM able to work in HA environment.
Commit so far consists in a general architecture and ability to save DialogSet related data (id, state, DialogSet creating request) and also some working functionality regarding HA, like updating DialogSet data from DB before working with it and recreating a DialogSet when it was created externally in DB.


git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-ezucerls-20131210@10740 ddefafc4-47db-0310-ae44-fa13212b10f2
Some refactoring of class DialogSetPersistenceManager (better names of member functions)
Added code for syncDialogSetChangesToPersistence which checks for flags and calls appropriate function to update/add/remove the DialogSet.


git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-ezucerls-20131210@10744 ddefafc4-47db-0310-ae44-fa13212b10f2