Sy/elastic sc tags

[steveny91]

What does this PR do?

The host tag should have been reserved since it's observed to create new hosts in the infra list. This change hopes to change that by removing it from the service checks. This will be opt in as to not break any backwards compatibility.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.55%. Comparing base (d837ba9) to head (fbaff0a).
Report is 19 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
elastic	93.41% <100.00%> (+0.08%)	⬆️
hive	?
hivemq	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?

Flags with carried forward coverage won't be shown. Click here to find out more.