Add JavadocPackageCheck to the default Spring checks

[wilkinsona]

No description provided.

[spencergibb]

Can it be optional?

[philwebb]

It should be easy enough to exclude

[wilkinsona]

The check can be excluded completely using the excludes property when declaring the SpringChecks module:

<module name="io.spring.javaformat.checkstyle.SpringChecks">
    <property name="excludes" value="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocPackageCheck" />
</module>

Alternatively, JavadocPackage can be suppressed in checkstyle-suppressions.xml for specific files where the check is unwanted.