Change default folder for block streams

[netopyr]

Please update the default folder where block streams are stored.

The default, configured in BlockStreamConfig.blockFileDir should point to "/opt/hgcapp/blockStreams"

We probably want to change the application.properties to keep the current behavior in some of the environments.

It was also pointed out, that the new folder needs to be mounted in the docker-compose definitions. Currently only these folders are mounted:

                /opt/hgcapp/accountBalances
                /opt/hgcapp/eventsStreams
                /opt/hgcapp/recordStreams
                /opt/hgcapp/services-hedera/HapiApp2.0/data/config
                /opt/hgcapp/services-hedera/HapiApp2.0/data/diskFs
                /opt/hgcapp/services-hedera/HapiApp2.0/data/keys
                /opt/hgcapp/services-hedera/HapiApp2.0/data/onboard
                /opt/hgcapp/services-hedera/HapiApp2.0/data/saved
                /opt/hgcapp/services-hedera/HapiApp2.0/data/stats
                /opt/hgcapp/services-hedera/HapiApp2.0/data/upgrade