Correct error with have_received counts
* add triangulation example for have_received error
* rescue RSpec::Mocks::MockExpectationError when replaying expectations,
  we need to count them all.
Don't raise an expectation when counting in have_received
extend rubocop class definition
changelog for #793
[skip ci]
Merge pull request #793 from rspec/fix_issue_with_have_received_matcher

Wrong error message generated by have_received matcher when method was called 2 or more times than expected