Update Gradle to do static code analysis

[mrspaceman]

Feature Request

Description of Problem:

Make Gradle automatically check the code for possible errors by using the static code analysis plugins available.

For example, the following plugins could be added:

• CheckStyle
• PMD
• FindBugs
• Surefire Code Coverage
• Changes
• Taglist
• Javadoc
• Sonar

adding these static analysis tools will help us improve the quality of the codebase. A potential cost would be that they could be found irritating, or introduce verbosity and lack of clarity of the build process to the user. These could negatively impact external contributors.