Clean up dependencies

- Fail on errors from maven-dependency-plugin and maven-enforcer-plugin
- Update parent version
- Simplify configuration for maven-enforcer-plugin
- Exclude unused or conflicting dependencies
- Declare dependencies which were used but not declared
- Update shrinkwrap-resolver and fix Deployments class
- Put boms at the top of server pom to avoid mismatched dependencies
Merge pull request #155 from zanata/clean-up-deps

Clean up dependencies