Self serve replication API server side implementation

[chenselena]

Summary

Branched off from #220, this PR adds the server side implementation for the self serve replication API. Separate PR for SQL level changes can be found here: #226.

This PR adds validations for the interval and destination cluster parameters and stores the replication config as part of table policies in table properties.

Validations on parameters:

• Destination cluster cannot be the same as the source cluster of the table.
• For the interval parameter, if user inputted it should be in the format H or D where hourly inputs can be 12H and daily inputs can be 1-3D.

This PR doesn't include the changes to generate the cron schedule from the interval input, those will be made in a separate PR.

Changes

• Client-facing API Changes
• Internal API Changes
• Bug Fixes
• New Features
• Performance Improvements
• Code Style
• Refactoring
• Documentation
• Tests

For all the boxes checked, please include additional details of the changes made in this pull request.

Testing Done

• Manually Tested on local docker setup. Please include commands ran, and their output.
• Added new tests for the changes made.
• Updated existing tests to reflect the changes made.
• No tests added or updated. Please explain why. If unsure, please feel free to ask for help.
• Some other form of testing like staging or soak time in production. Please explain.

Added unit testing.

Tested with local docker server:
successful POST to http://localhost:8000/v1/databases/u_tableowner/tables with parameters:

{
    "tableId": "test_table",
    "databaseId": "u_tableowner",
    "baseTableVersion": "INITIAL_VERSION",
    "clusterId": "LocalHadoopCluster",
    "schema": "{\"type\": \"struct\", \"fields\": [{\"id\": 1,\"required\": true,\"name\": \"id\",\"type\": \"string\"},{\"id\": 2,\"required\": true,\"name\": \"name\",\"type\": \"string\"},{\"id\": 3,\"required\": true,\"name\": \"ts\",\"type\": \"timestamp\"}]}",
    "tableProperties": {
        "key": "value"
    },
    "policies": {
        "sharingEnabled": "true",
        "replication": {
            "config": [
                {
                    "destination": "LocalHadoopClusterA",
                    "interval": "12H"
                }
            ]
        }
    }
}

successful POST to http://localhost:8000/v1/databases/u_tableowner/tables with parameters:

{
    "tableId": "test_table",
    "databaseId": "u_tableowner",
    "baseTableVersion": "INITIAL_VERSION",
    "clusterId": "LocalHadoopCluster",
    "schema": "{\"type\": \"struct\", \"fields\": [{\"id\": 1,\"required\": true,\"name\": \"id\",\"type\": \"string\"},{\"id\": 2,\"required\": true,\"name\": \"name\",\"type\": \"string\"},{\"id\": 3,\"required\": true,\"name\": \"ts\",\"type\": \"timestamp\"}]}",
    "tableProperties": {
        "key": "value"
    },
    "policies": {
        "sharingEnabled": "true",
        "replication": {
            "config": [
                {
                    "destination": "LocalHadoopClusterA",
                    "interval": "1D"
                }
            ]
        }
    }
}

Using interval: 24H gives the following error:

{
    "status": "BAD_REQUEST",
    "error": "Bad Request",
    "message": " : Replication interval for the table LocalHadoopCluster.u_tableowner.test_table1 can either be 12 hours or daily for up to 3 days",
    "stacktrace": null,
    "cause": "Not Available"
}

Trying to set the destination cluster as the source cluster gives the following error:

{
    "status": "BAD_REQUEST",
    "error": "Bad Request",
    "message": " : Replication destination cluster for the table LocalHadoopCluster.u_tableowner.test_table1 must be different from the source cluster",
    "stacktrace": null,
    "cause": "Not Available"
}

For all the boxes checked, include a detailed description of the testing done for the changes made in this pull request.

Additional Information

• Breaking Changes
• Deprecations
• Large PR broken into smaller PRs, and PR plan linked in the description.

For all the boxes checked, include additional details of the changes made in this pull request.

[HotSushi]

some pre comments

[rohitkum2506]

Thanks @chenselena for plugging in the backend components. Added a few comments/questions on first pass.

[rohitkum2506]

Thanks @chenselena for perseverance in getting it done.