Build Congress RPM package

Build Congress RPM package

Changes include:
 - RPM build for congress moved into Apex
 - Fixes missing log dir for congress in spec
 - Adds missing API network definition for Congress
 - Fixes URL for getting doctor driver
 - Increases controller default RAM to 10GB due to resource contention
   with ODL
 - Fixes Congress service config/db sync in THT to be in step 3

opnfv-tht-pr: 51

JIRA: APEX-212

Change-Id: I4a55646e7ef851782ae0d1963f7b479086958365
Signed-off-by: Carlos Goncalves <carlos.goncalves@neclab.eu>
Signed-off-by: Tim Rozet <trozet@redhat.com>