Added support for new option `hideErrors`

This option will prevent tagging of selected services errors with error=false and their sampling priority won't be set to 1.

When the option is specified with a service path and an array of error codes, it will "hide" these errors when filtering Jaeger UI with error=true. This way, a user can exclude certain errors that are part of his normal implementation flow and have a much more clear focus on the real errors in his system.

For examples, check the docs