v1.2.16-notebowl-1: feat(ngMock): add flushByIndex function

Adds a flushByIndex function to allow pending requests on httpBackend to be flushed in an arbitrary
order.

v1.2.8-notebowl: feat(ngMock): add flushByIndex function

Adds a flushByIndex function to allow pending requests on httpBackend to be flushed in an arbitrary
order.