Use flavor that exists in multiple CityCloud regions

We need to shift CI workloads across different regions
in order to find working one but not all flavors exist
in all regions. This change replaces the flavor with the
one that exists in Frankfurt and Karlskrona region.

Change-Id: I2e822f6b5b4690e48b44a033e5f77498b29b4334
1 file changed