fix duplicate declaration of http check

we gotta use more specific names than just
'http' for those checks, or if we combine
the roles on one host, as i just did, we are getting
puppet errors not liking this:

Error 400 on SERVER: Duplicate declaration:
Monitor_service[http] is already declared ...

Change-Id: Id6d8bf8b99407cc82bc2e5b4cc561cdd8476cf85
Merge "fix duplicate declaration of http check" into production