Ambari metrics integration assumes that all metrics are floating point numbers, resulting in dropping of 100s of metrics

[meyarivan]

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Output of the info page

Agent (v7.53.0)
....

Additional environment details (Operating System, Cloud provider, etc):

Steps to reproduce the issue:

1. Set up integration with Ambari
2. Enable collection of metrics for component services such as HDFS and YARN
3. Check the output of "datadog-agent status" for the metrics that are being ignored

Describe the results you received:

datadog-agent status output is full of messages of the following form:

Warning: Expected a float for rpc.callQueueLen, received 0
Warning: Expected a float for rpc.SentBytes, received 10169111223
....

Describe the results you expected:

Additional information you deem important (e.g. issue happens only occasionally):

IIUC this is the offending line : https://github.com/DataDog/integrations-core/blob/master/ambari/datadog_checks/ambari/ambari.py#L101. It could be if isinstance(value, (float, int)): instead.