[DMAAP][MR] Allow kafka to run with < 3 replicas

Current hardcoded configuration doesn't allow kafka to be run with less
than 3 replicas.
This patch fixes this

Issue-ID: OOM-2831
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: Iffd78a3eaa808e62a74fbc08f26e19f1644440df
2 files changed