Added attribute to xsd, added conditional handler to validator
Added api-coverage attribute to examples
Added unit test
Removed EOL semicolons
Updated test to be less awful
Changed attribute name
Oops, missed the conditional after the name change
Conditional ignoring of sinks
Updated the test with the new method signature
add test to verify enable-api-coverage handler
clean up some un-used variables
Merge pull request #969 from rackerlabs/REP-323

REP-323 Make API Coverage in API Validator Configurable