Camel metrics

[laurikimmel]

Camel Metrics component.

• Merged source code from https://github.com/laurikimmel/camel-metrics/tree/master.
• Repalced pom.xml.
• Fixed build issues.
• Fixed Checkstyle errors.
• Externalized dependency versions.
• Updated needed parent pom.xml files.
• Keeping documentation in README.md for now.

[davsclaus]

Hi do you mind creating a new PR with the component added to the master branch of Apache Camel, and where the component is added to the components directory, where all the other components are.

The current patch / PR cannot be applied without a lot of work on our end.

[laurikimmel]

I will look the master branch issue.

The second issue looks strange to me since new files are added to components/camel-metrics folder next to all other components. When I tested with local merge to master all files where there as expected. So it's hard for me to understand what exactly is misplaced.

Also noticed that some of the unit tests in camel-metrics component are broken after update from main repository. I will update them as needed.

[laurikimmel]

Merged Camel Metric component to master branch, fixed unit tests and created new pull request #229