fluentd: Suppress unread configuration warning

[tarokkk]

What this PR does / why we need it:
This PR is to resolve fluentd warning for <label> configuration.

2019-11-08 13:29:55 +0000 [warn]: section <label> is not used in <match **> of loki plugin
2019-11-08 13:29:55 +0000 [warn]: section <label> is not used in <match **> of loki plugin
2019-11-08 13:29:55 +0000 [warn]: section <label> is not used in <match **> of loki plugin
2019-11-08 13:29:55 +0000 [warn]: section <label> is not used in <match **> of loki plugin

With the fix it should disappear

+1 Fix mandatory client cert configuration

Checklist

• Documentation added
• Tests updated

[tarokkk]

@cyriltovena please take a look

[cyriltovena]

LGTM.

[cyriltovena]

I'll push the fix today.

[cyriltovena]

@tarokkk pushed the new gems, thanks for that, do you want to join the loki team to take care of those PR on fluentd, if yes I'm happy to suggest you.

I realized I'm not doing a good job for them, specially testing wise because I don't use it.

[tarokkk]

Yeah sure, I'm happy to help