Description
Refactoring include:
Change the groupId to not include the 'incubator' and replace it with 'hama' as the 'incubating' suffix is already added to the artifact version and the artifactId to 'hama-core', thus the resulting artifact would be org.apache.hama/hama-core/$version-incubating.
Create a profile 'examples' to generate the hama-examples jar with Maven