Baseline integration test

[jeffbanks]

Feature Description
Utilizing Testify and Terratest, create an integration test that references a cassdc manifest and verifies that the CassandraDatacenter deploys successfully.

Manifest sample:
apiVersion: cassandra.datastax.com/v1beta1
kind: CassandraDatacenter
metadata:
name: k8ssandra-test
spec:
clusterName: cluster1
serverType: cassandra
serverVersion: "3.11.7"
managementApiAuth:
insecure: {}
size: 3
storageConfig:
cassandraDataVolumeClaimSpec:
storageClassName: server-storage
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
config:
cassandra-yaml:
authenticator: org.apache.cassandra.auth.PasswordAuthenticator
authorizer: org.apache.cassandra.auth.CassandraAuthorizer
role_manager: org.apache.cassandra.auth.CassandraRoleManager
jvm-options:
initial_heap_size: "800M"
max_heap_size: "800M"
additional-jvm-opts:
# As the database comes up for the first time, set system keyspaces to RF=3
- "-Ddse.system_distributed_replication_dc_names=dc1"
- "-Ddse.system_distributed_replication_per_dc=3"

[jeffbanks]

Moved this to WIP GA as I will need to refactor integration foundations with effort to consolidate merge of k8ssandra-operator and k8ssandra-cluster.

[jeffbanks]

01/19/2020 - moving out of the 1.0 release scope.

[jeffbanks]

This effort is being addressed as part of #204 w/ release 1.0 components.