Take DBAAS multi-channel publishing Redis modules into use

Take DBAAS multi-channel publishing Redis modules into use

Following SDL APIs are defined so that multiple channel-event pairs can be
given as function argument but actual SDL implementation utilized such a DBAAS
(Redis) module what expect to get only one channel-event pair. Fix the
implementation of these SDL APIs to use the correct DBAAS module what support
multiple channel-event pairs:
* SetIfAndPublish()
* SetIfNotExistsAndPublish()
* RemoveIfAndPublish()

Please note that in runtime environment DBAAS service needs to run on DBAAS
image version 0.4.0 or newer. Older images do not have multiple channel-event
pairs support as a Redis module.

Fixed also potential type conversion issue in SDL APIs RemoveIf() and
RemoveIfAndPublish() what can lead to SDL application crash.

Issue-ID: RIC-759

Signed-off-by: Timo Tietavainen <timo.tietavainen@nokia.com>
Change-Id: I74f483bb31e0c6aed10983a83d70a45272d71fa4