enabled custom filters in metric-aggr

[hvaghani221]

Fixing #621

[hvaghani221]

I have rebased with develop.

[rockb1017]

let's add aggrCustomFilters: to values.yaml so that user can specify a different custom filter.

[hvaghani221]

let's add aggrCustomFilters: to values.yaml so that user can specify a different custom filter.

There is already custom filter example in values.yaml file

splunk-connect-for-kubernetes/helm-chart/splunk-connect-for-kubernetes/values.yaml

Lines 489 to 501 in d8a62ec

	# For example if you want to define a filter which sets cluster_name field to "my_awesome_cluster" you would the following filter
	# <filter tail.containers.**>
	# @type jq_transformer
	# jq '.record.cluster_name = "my_awesome_cluster" | .record'
	# </filter>
	# This can be defined in the customFilters section as follows:
	# ```
	# customFilters:
	# NamespaceSourcetypeFilter:
	# tag: tail.containers.**
	# type: jq_transformer
	# body: jq '.record.cluster_name = "my_awesome_cluster" | .record'
	# ```

It is same for all SCK plug-in. Same example would apply for this plugin as well.
What are your thoughts?

[chaitanyaphalak]

I think @rockb1017 is right on this one, we need to differentiate between filters for metrics and metrics-agg

[hvaghani221]

Hey @rockb1017, added customFiltersAggr config