Add Redis and Cassandra config support to helm chart

Using Redis:

```
CLOUDINFO_STORE_REDIS_ENABLED=true
CLOUDINFO_STORE_REDIS_HOST=localhost
CLOUDINFO_STORE_REDIS_PORT=6379
```

Using Cassandra:
```
CLOUDINFO_STORE_CASSANDRA_ENABLED=true
CLOUDINFO_STORE_CASSANDRA_HOSTS=localhost
CLOUDINFO_STORE_CASSANDRA_PORT=9042
CLOUDINFO_STORE_CASSANDRA_KEYSPACE=cloudinfo
CLOUDINFO_STORE_CASSANDRA_TABLE=products
```