**Apache Airflow version**:  1.10.10


**Kubernetes version (if you are using kubernetes)** (use `kubectl version`): v1.15.11

KubernetesPodOperator truncates logs when container produces more than 10 lines of logs before execution of `read_pod_logs` function. Is there any reason to make 10 as default value for `tail_lines` argument ?
```python
    def read_pod_logs(self, pod: V1Pod, tail_lines: int = 10):
        """Reads log from the POD"""
        try:
            return self._client.read_namespaced_pod_log(
                name=pod.metadata.name,
                namespace=pod.metadata.namespace,
                container='base',
                follow=True,
                tail_lines=tail_lines,
                _preload_content=False
            )
        except BaseHTTPError as e:
            raise AirflowException(
                'There was an error reading the kubernetes API: {}'.format(e)
            )
```
airflow/kubernetes/pod_launcher.py
if resp.is_open():
            self.log.info('Running command... %s\n', command)
            resp.write_stdin(command + '\n')
            while resp.is_open():
                resp.update(timeout=1)
                if resp.peek_stdout():
                    return resp.read_stdout()
                if resp.peek_stderr():
                    self.log.info(resp.read_stderr())
                    break
        return None
    def process_status(self, job_id, status):
        """Process status information for the JOB"""
        status = status.lower()
        if status == PodStatus.PENDING:
            return State.QUEUED
        elif status == PodStatus.FAILED:
            self.log.error('Event with job id %s Failed', job_id)
            return State.FAILED
        elif status == PodStatus.SUCCEEDED:
            self.log.info('Event with job id %s Succeeded', job_id)
            return State.SUCCESS
        elif status == PodStatus.RUNNING:
            return State.RUNNING
        else:
            self.log.error('Event: Invalid state %s on job %s', status, job_id)
            return State.FAILED