Remove DBConnection and make concurrent requests · whatyouhide/xandra@33d2e3b

test beta protocol v5 (ProtocolNegotiationTest)

test returns an error if the connection is not established (XandraTest)

test resiliency if the control connection shuts down with :closed, the pool is fine and starts a new one (Xandra.Cluster.PoolTest)

test startup waits for nodes to be up with :sync_connect (Xandra.Cluster.PoolTest)

test resiliency if the connection pool supervisor crashes, the pool crashes as well (Xandra.Cluster.PoolTest)

test startup times out correctly with :sync_connect (Xandra.Cluster.PoolTest)

test resiliency if the control connection crashes, the pool crashes as well (Xandra.Cluster.PoolTest)

test resiliency if a connection pool crashes, the pool process stays up and cleans up (Xandra.Cluster.PoolTest)

test handling change events multiple :discovered_hosts where hosts are removed (Xandra.Cluster.PoolTest)

test prepare/3 prepares a query (Xandra.ClusterTest)

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/setup-java@v2, jwalton/gh-docker-logs@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

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