Add HTTP status phrase in reponse for metricsbeat http module (#5470)

[liketic]

Closes #5470

[elasticmachine]

Can one of the admins verify this patch?

[exekias]

LGTM, thank you!! You will need to run make update to update docs with the new field

[liketic]

@exekias Yes, thanks. I pushed 0997023 . Please review again.

[christiangalsterer]

Actually I was just to submit a PR as well... seems that @liketic was a little bit faster ;-)
I would like to make one additional suggestion:

• Rename status_phrase to just phrase to keep the field names harmonised between different beats, here Packetbeat. There is a discussion about this in Harmonize field names between Packetbeat HTTP and Metricbeat Module #5354 and a pending PR i5354: Harmonize field names between Packetbeat HTTP and Metricbeat Module #5469.

[christiangalsterer]

Maybe add an example, e.g. OK for a 200 response?

[christiangalsterer]

Just curious if you have seen my previous comment on harmonizing the names.
@ruflin: What do you think?

[ruflin]

@christiangalsterer +1 on harmonizing field names.
@liketic WDYT?

[liketic]

@christiangalsterer @ruflin I think it's OK to me.

[ruflin]

@liketic Could you update the PR accordingly in case @andrewkroh has no objections?

[liketic]

@ruflin @christiangalsterer Apologises for the delay. I pushed 5a381dd . Please review again.

[christiangalsterer]

LGTM

[ruflin]

jenkins, test it