Add debugql subcommand to manager

[utopiabound]

The -r option will result in iml debugapi -r POST graphql DATA
talking to /graphql instead of /api/graphql/

Signed-off-by: Nathaniel Clark nclark@whamcloud.com

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This change is 

[jgrund]

Given graphql is much more restricted in the HTTP verb sense (only GET and POST and we could probably just restrict to POST for this purpose) I wonder if it would instead make sense to expose two separate commands:

debugapi for interfacing with REST API, debuggraphql to interface with graphql.

In lieu of that perhaps change the arg to -n / --no-path-prefix or something similar.

[utopiabound]

# iml debugql POST '{ getFsClusterHosts(fsName:"fs10") }'|json_reformat 
{
    "data": {
        "getFsClusterHosts": [
            [
                2,
                1
            ],
            [
                4,
                3
            ]
        ]
    }
}

[ip1981]

Maybe you could omit POST at all for GraphQL.