Creation of org.jboss.tools.common.core component

As part of the refactor of the "common" component, this jira will track the addition of a new plugin. Some complain that common already has too many plugins, so this new plugin's creation will follow a careful process to ensure the new plugin has a purpose, is not repetitive, and helps move the component into a cleaner direction rather than a messier one.

The process (in progress) is being formed over at https://community.jboss.org/wiki/DevelopingForJBossTools