bump metricbeat to latest chart and app version

[masterkain]

============================= test session starts ==============================
platform linux -- Python 3.7.5, pytest-4.1.0, py-1.8.0, pluggy-0.13.0 -- /usr/local/bin/python
cachedir: .pytest_cache
rootdir: /app/metricbeat, inifile:
collecting ... collected 15 items

tests/metricbeat_test.py::test_defaults PASSED
tests/metricbeat_test.py::test_adding_envs PASSED
tests/metricbeat_test.py::test_adding_image_pull_secrets PASSED
tests/metricbeat_test.py::test_adding_tolerations PASSED
tests/metricbeat_test.py::test_override_the_default_update_strategy PASSED
tests/metricbeat_test.py::test_setting_a_custom_service_account PASSED
tests/metricbeat_test.py::test_self_managing_rbac_resources PASSED
tests/metricbeat_test.py::test_setting_pod_security_context PASSED
tests/metricbeat_test.py::test_adding_in_metricbeat_config PASSED
tests/metricbeat_test.py::test_adding_a_secret_mount PASSED
tests/metricbeat_test.py::test_adding_a_extra_volume_with_volume_mount PASSED
tests/metricbeat_test.py::test_adding_a_node_selector PASSED
tests/metricbeat_test.py::test_adding_an_affinity_rule PASSED
tests/metricbeat_test.py::test_cluster_role_rules PASSED
tests/metricbeat_test.py::test_adding_pod_labels PASSED

=============================== warnings summary ===============================
tests/metricbeat_test.py::test_defaults
  /usr/local/lib/python3.7/site-packages/yaml/constructor.py:126: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working
    if not isinstance(key, collections.Hashable):

-- Docs: https://docs.pytest.org/en/latest/warnings.html
==================== 15 passed, 1 warnings in 23.84 seconds ====================

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[fatmcgav]

Jenkins test this please

[jmlrt]

⛴

[jmlrt]

FYI, this PR introduced a breaking change during Metricbeat Helm upgrade => #395