ExploitAttempt Specs

Add specs and factory for ExploitAttempt
Use existing event factory

pro had an event factory, move that over to Mdm and use it
ExploitedHost spec

ExploitedHost spec added
uncovered that the model does not match the schema?!
HostDetail spec

added spec and factory for Mdm::HostDetail
Add associations to hosttag spec

Mdm::HostTag spec didn't test associations
Added appropriate specs
not much to see here