Changed the default multicast address.

Changed the default multicast address.

There's an issue with macOS when docker is installed and a multicast
address different than 224.0.0.1 is used.
https://stackoverflow.com/questions/46341715/hazelcast-multicast-does-not-work-because-of-vboxnet-which-is-used-by-docker-mac

Re-organized the test hazelcast yaml since we now fill the cluster-name
and instance-name information from the ClusterInfo object during
creation. No need to pass it in the config file anymore. This is causing
every file to be the exact same thus the consolidation.

Also fix an issue with test case using the same hazelcast service in two
different threads causing intermittent issue during the build process.

Issue-ID: CCSDK-2119
Signed-off-by: Sebastien Premont-Tendland <sebastien.premont@bell.ca>
Change-Id: I7f8328bfd93cdcabe8ab2fa844cbf9dd57f1493a