fix: Make sure there is only one response in data

[jhutar]

There might be data like this:

{
    'status': 'success',
    'data': {
        'resultType': 'matrix',
        'result': [
            {
                'metric': {
                    '__name__': 'locust_requests_avg_response_time',
                    'container': 'locust-metrics-exporter',
                    'endpoint': 'prometheus-metrics',
                    'instance': '10.128.2.35:9646',
                    'job': 'mvp-test-master',
                    'name': 'Aggregated',
                    'namespace': 'locust-operator',
                    'pod': 'mvp-test-master-2rtl5',
                    'prometheus': 'openshift-user-workload-monitoring/user-workload',
                    'service': 'mvp-test-master'
                },
                'values': [
                    [1709228056, '387.54814499811835']
                ]
            },
            {
                'metric': {
                    '__name__': 'locust_requests_avg_response_time',
                    'container': 'locust-metrics-exporter',
                    'endpoint': 'prometheus-metrics',
                    'instance': '10.128.2.46:9646',
                    'job': 'mvp-test-master',
                    'name': 'Aggregated',
                    'namespace': 'locust-operator',
                    'pod': 'mvp-test-master-9hlzj',
                    'prometheus': 'openshift-user-workload-monitoring/user-workload',
                    'service': 'mvp-test-master'
                },
                'values': [
                    [1709228071, '925.4287625888538'], [1709228086, '1470.1749300681954'], [1709228101, '2156.182596251187'], [1709228116, '2117.3740125609174'], [1709228131, '2101.9880769279166'], [1709228146, '2199.479863616386'], [1709228161, '2485.2154790917293'], [1709228176, '2448.4574473097337'], [1709228191, '2414.1250702929106'], [1709228206, '2444.2160835779805'], [1709228221, '2528.3223100392597'], [1709228236, '2518.5057251476287'], [1709228251, '2521.676076221177'], [1709228266, '2529.1457884724887'], [1709228281, '2548.69447795587'], [1709228296, '2560.640720847256'], [1709228311, '2563.8768622192015'], [1709228326, '2578.944299676874'], [1709228341, '2586.787705514493'], [1709228356, '2582.892992186117'], [1709228371, '2589.8548205388893'], [1709228386, '2585.867479647283'], [1709228401, '2576.483825774135'], [1709228416, '2577.8566617293022'], [1709228431, '2575.2561719846567'], [1709228446, '2591.270312663225'], [1709228461, '2590.0634648920886'], [1709228476, '2591.638425500105'], [1709228491, '2604.0612509620596'], [1709228506, '2608.246523852518'], [1709228521, '2602.0875226316452'], [1709228536, '2602.4346144599826'], [1709228551, '2616.7663989678563'], [1709228566, '2628.015782285809'], [1709228581, '2614.704750094623'], [1709228596, '2610.288395967332'], [1709228611, '2626.2464825699'], [1709228626, '2636.3745570608785'], [1709228641, '2631.999420078156'], [1709228656, '2623.5940233418182'], [1709228671, '2619.005739752889'], [1709228686, '2619.005739752889'], [1709228701, '2619.005739752889'], [1709228716, '2619.005739752889']
                ]
            }
        ]
    }
}

Maybe because Locust pod restarted?

[openshift-ci]

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[jhutar]

I'll self-merge to be able to trigger some more jobs.