Change event_query property to use log query definition in dashboard widgets

[api-clients-generation-pipeline]

See DataDog/datadog-api-spec#651

[jirikuncar]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #529 (879c414) into master (7a724b3) will decrease coverage by 1.64%.
The diff coverage is 2.27%.

Impacted Files	Coverage Δ	Complexity Δ
...tadog/api/v1/client/model/ChangeWidgetRequest.java	40.17% <ø> (ø)	31.00 <0.00> (ø)
...api/v1/client/model/DistributionWidgetRequest.java	25.97% <ø> (ø)	16.00 <0.00> (ø)
...om/datadog/api/v1/client/model/HostMapRequest.java	21.42% <ø> (ø)	13.00 <0.00> (ø)
...g/api/v1/client/model/QueryValueWidgetRequest.java	30.33% <ø> (ø)	19.00 <0.00> (ø)
...atadog/api/v1/client/model/ScatterPlotRequest.java	25.97% <ø> (ø)	16.00 <0.00> (ø)
...atadog/api/v1/client/model/TableWidgetRequest.java	38.75% <ø> (ø)	32.00 <0.00> (ø)
...g/api/v1/client/model/TimeseriesWidgetRequest.java	47.57% <ø> (ø)	31.00 <0.00> (ø)
...adog/api/v1/client/model/ToplistWidgetRequest.java	28.08% <ø> (ø)	18.00 <0.00> (ø)
.../api/v2/client/model/IncidentCreateAttributes.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...atadog/api/v2/client/model/IncidentCreateData.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
... and 63 more