Automate Spring Roo code formatting - Use Google Code Style

Automate formatting of Spring Roo code. This will allow developers to contribute to Spring Roo project and mantain a valid code format.

Spring Roo will use Eclipse Java Code Format definition based on Google Style:

• References:
  • https://github.com/google/styleguide
  • https://github.com/google/styleguide/blob/gh-pages/eclipse-java-google-style.xml

To do:

• Create "devel-resources" folder on Spring Roo project.
• Include eclipse-java-google-style_no-doc-format.xml on previous folder
• Include plugin maven-java-formatter-plugin like:

       <plugin>
            <groupId>com.googlecode.maven-java-formatter-plugin</groupId>
            <artifactId>maven-java-formatter-plugin</artifactId>
            <version>0.4</version>
            <configuration>
                <lineEnding>LF</lineEnding>
                <configFile>${devel.resources.path}/FORMATTER_NAME.xml</configFile>
                 <excludes>
                    <exclude>org/springframework/roo/bootstrap/Main.java</exclude>
                    <exclude>org/springframework/roo/bootstrap/AutoProcessor.java</exclude>
                </excludes>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>format</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
  

• Update Spring Roo README.adoc indicating Code Style